JP2015017534A - Transportable drainage pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new transportable drainage pump that can be vertically installed.SOLUTION: A transportable drainage pump comprises a pump body including: a main shaft; a discharge port provided on one side in the direction of the main shaft; a suction port provided on another side opposite to the discharge port; and an electric motor. The transportable drainage pump also comprises a protection member provided at an end part on the other side of the pump body to protect the pump body.

Description

  The present invention relates to a portable drain pump.

  In recent years, flood damage has frequently occurred due to typhoons, low pressure, heavy rains and tsunamis caused by fronts. For this reason, the situation where the inundation cannot be prevented only by the drainage by the pumping station (drainage station) constructed in a specific place has occurred. In order to cope with such a situation, a lightweight drainage pump that can be easily installed in an unspecified place, that is, a portable drainage pump has been developed and put into practical use (for example, Patent Documents 1 and 2 below) ). Such a portable drainage pump is transported to a necessary place by a drainage pump vehicle equipped with equipment necessary for drainage such as a generator and an operation control panel, and is usually poured into water by human power.

  Such portable drainage pumps are generally connected to a float by ropes, metal fittings, etc., and are used in a state suspended in water by a float that floats on the water surface, and drainage using a lightweight hose connected to the pump. Is done. The portable drainage pump has a horizontal shaft installation type (for example, Patent Document 1) used in a posture where the main shaft of the pump extends in the horizontal direction, and a vertical shaft installation type (for example, patent) in which the main shaft extends in the vertical direction. Reference 2), and the horizontal axis installation type is the mainstream.

JP 2009-197669 A JP 2008-2411 A

  However, the conventional horizontal axis installation type has the following problems. First, since the horizontal axis installation type has a large horizontal dimension, it may be difficult to install the pump during flooding in urban areas. That is, a pump cannot be installed in a narrow place such as a manhole or a stairway leading to a basement. Second, since the center of gravity is not located at the center of the pump, the horizontal axis installation type lacks stability in the horizontal direction and deteriorates workability in hanging (installing) and lifting (removing).

  On the other hand, the vertical axis installation type has a smaller horizontal dimension than the horizontal axis installation type, so it can be installed in a narrow place. Moreover, since the center of gravity is at the center of the pump, the vertical shaft installation type is easy to suspend and lift. On the other hand, the vertical shaft installation type has the following problems. First, since the vertical installation type has a large vertical dimension, when the pump moves downward as the water level drops due to drainage, the lower end of the pump suspended from the float before the water level drops to the desired height. The unit may collide with the bottom of the pump installation site and the pump may be damaged. Secondly, when the pump moves downward as the water level decreases, the pump is suspended by the hose unless the hose connected to the pump suitably follows the movement of the pump. The load is directly applied to the hose, and the hose may be damaged. Thirdly, since the pump is suspended from the float on the surface of the water, when the pump is put into the water from a steep quay or levee, the pump oscillates and collides with the quay or the levee and is damaged. There is a case. Fourth, the entire float rotates due to the rotational force associated with the operation of the pump. As a result, the hose may be twisted to prevent drainage, or the cable connected to the motor may be entangled with the pump and damaged.

  In addition, it is desirable for the portable drainage pump to be able to suppress failure, improve operability according to the situation at the site, and improve operational reliability.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as, for example, the following forms.

  The 1st form of this invention is provided as a portable drainage pump. This portable drain pump includes a pump body having a main shaft, a discharge port provided on one side in the direction of the main shaft, a suction port provided on the other side of the discharge port, and an electric motor. The portable drain pump further includes a protective member that is provided at the other end of the pump body and protects the pump body.

  Such a portable drainage pump can be used in a posture in which the main shaft is in the vertical direction, that is, as a vertical shaft installation type. By using it as a vertical shaft installation type, it is possible to install a pump in a place where the pump input space is narrow, such as a manhole. Moreover, since the center of gravity is located at the center of the pump, the stability in the horizontal direction is excellent. For this reason, it is excellent in workability | operativity in hanging and lifting of a pump. Furthermore, unlike the conventional method in which the pump body is suspended from the float, the pump can be installed and used on the bottom plate at the installation location. Therefore, the load of the pump body is directly applied to the hose due to the drop in water level, and the hose is not damaged. In addition, the swirling of the pump due to the rotational force of the pump is suppressed as compared with the case where the pump is operated in a floating state. As a result, it is possible to prevent the hose from being twisted to prevent drainage and the cable connected to the electric motor from being entangled with the pump body and being damaged. Furthermore, when installing a pump in water, it can suppress with a protective member that the lower end part of a pump collides with a baseplate and is damaged. Furthermore, since there is no need to suspend the pump from the float as in the prior art, the pump is less likely to swing when the pump is poured into water. As a result, it is possible to suppress the pump body from colliding with the quay or the like and being damaged.

  As a second aspect of the present invention, in the first aspect, the discharge port may be formed so as to open in the direction of the main axis. According to this form, the waste water is discharged upward in the vertical direction. For this reason, since the pump is pressed against the bottom plate by the reaction force of the drainage discharged from the discharge port, the pump swinging due to the rotational force of the pump is further suppressed, and the pump can maintain a stable posture. As a result, hose twisting and cable entanglement can be further suppressed.

  As a third aspect of the present invention, in the first or second aspect, the protective member is a first float that generates a buoyancy smaller than the underwater weight of the pump body, and surrounds the other end of the pump body. A first float may be provided. According to this mode, the buoyancy of the pump is increased, so that the settling speed of the pump when installing the pump can be reduced. Therefore, when installing a pump, it can suppress further that the lower end part of a pump collides with a bottom board and is damaged.

As a 4th form of this invention, the portable drainage pump of the 3rd form may be further provided with the 2nd float surrounding the edge part of the one side of a pump main body. The sum of the buoyancy of the first float and the second float may be smaller than the underwater weight of the pump body. The buoyancy that occurs in the second float may be greater than the buoyancy that occurs in the first float. According to this embodiment, the buoyancy of the pump is further increased, so that it is possible to further suppress the lower end portion of the pump from colliding with the bottom plate and being damaged when the pump is installed on the bottom plate. In addition, the pump outlet side, i.e., the upper side of the installed position of the pump, floats more easily than the lower side, so that the position of the pump is stable when the pump is submerged to the bottom, and the pump collides with the quay etc. It can be further suppressed. Furthermore, since the connection part of a discharge port and a hose can be protected by a 2nd float, even if a pump collides with a quay etc., damage to a pump can be suppressed.

  As a fifth aspect of the present invention, the portable drain pump of the fourth aspect may further include a connecting member that connects the first float and the second float. According to this form, the first float and the second float can be suitably fixed to the pump body.

  As a sixth aspect of the present invention, in the fifth aspect, there may be a plurality of connecting members. The plurality of connecting members may be arranged so as to surround and surround the pump body. According to this form, the connecting member can function as a screen to prevent foreign matter from being sucked into the pump body. As a result, the reliability of the pump is improved.

  As a seventh aspect of the present invention, in the fifth or sixth aspect, the connecting member may be configured such that the distance between the first float and the second float can be adjusted. According to this form, the connecting member can be used for various pumps having different lengths in the direction of the main shaft.

  As an eighth aspect of the present invention, in any of the fourth to seventh aspects, each of the first float and the second float is configured to be divisible or openable / closable in a direction intersecting the main axis. Also good. According to this mode, the first float, the second float, and the pump body can be easily attached and detached at the installation site of the pump. That is, if the first float and the second float are removed on site, they can be used as a horizontal axis installation type. Therefore, an advantageous one of horizontal axis installation or vertical axis installation can be selected according to the situation of the site, for example, the space of the installation site and the water level condition, and the operability on site is improved.

  As a ninth aspect of the present invention, in the eighth aspect, the second float has a groove portion into which a cable connected to the electric motor can be inserted on a surface of the second float that is divided or opened / closed. Also good. According to this form, the cable is prevented from being oscillated or entangled, so that the cable can be prevented from being damaged. Moreover, it is easy to install and remove the pump from the water.

  As a tenth aspect of the present invention, in any of the fourth to ninth aspects, the upper surface of the second float may have a luminous property, a luminous property, or a light reflection property. According to this form, even when the pump is installed in a dark place such as a manhole, it can be easily visually confirmed that the water level has dropped to the upper surface of the second float with the drainage of the pump. Therefore, it is possible to suppress a pump failure caused by continuing the operation of the pump while the water level is lower than the lowest operable pump level.

  As an eleventh aspect of the present invention, in any of the fourth to tenth aspects, the second float may be provided with a water level sensor for detecting a decrease in water level. According to such a form, even when the pump is installed in a dark place, it is easy to know that the water level has dropped to the predetermined position of the second float (the installation position of the water level sensor) with the drainage of the pump. Can do. Therefore, it is possible to suppress a pump failure caused by continuing the operation of the pump while the water level is lower than the lowest operable pump level.

  As a twelfth aspect of the present invention, in any one of the fourth to eleventh aspects, the first float and the second float are guides provided at the installation location of the portable drain pump, An engaging portion that can be engaged with a guide for guiding the portable drain pump toward the position may be provided. According to this form, if a guide is provided in a place where the installation of the pump is assumed, the pump can be guided to the installation position along the guide. Therefore, the installation work of the pump becomes easy.

  As a thirteenth aspect of the present invention, in any one of the first to twelfth aspects, the suction port may be provided between the electric motor and the discharge port. According to this form, in the posture at the time of installation of the pump, the suction port is positioned higher than the electric motor, so the distance between the bottom plate and the suction port is increased. Therefore, it becomes difficult to suck in foreign matter such as dust near the bottom plate from the suction port, and the reliability of the pump is improved.

It is explanatory drawing which shows schematic structure of the portable drainage pump as an Example of this invention. It is a schematic plan view of a 2nd float.

A. Example:
FIG. 1 shows a schematic configuration of a pump 10 as an embodiment of the present invention. The pump 10 is a portable drainage pump, and is used by being transported to an unspecified location where flood damage due to flood, tsunami, etc. has occurred by a pump vehicle (not shown) equipped with a generator, an operation control panel, etc. . The pump 10 is used by being installed on the bottom board at the installation location. In FIG. 1, the pump 10 is shown as being installed on the bottom board 106 of the manhole 105 as an example. As illustrated, the pump 10 includes a pump main body 15, a first float 60, a second float 70, a plurality of connecting members 80, and a water level sensor 90. The pump body 15 includes a casing 20, a main shaft 30, an impeller 40, and an electric motor 50. In this embodiment, the pump 10 is used as a vertical shaft installation type. That is, the pump body 15 is installed in a posture in which the main shaft 30 is in the vertical direction.

  A suction port 21 and a discharge port 22 are formed in the casing 20. The discharge port 22 is provided on one side in the direction of the main shaft 30 (upper side in the installation posture). The suction port 21 is provided below the discharge port 22. Further, in the present embodiment, the suction port 21 is formed between the electric motor 50 and the discharge port 22. That is, the suction port 21 is located above the electric motor 50 in the posture at the time of installation of the pump 10. According to such a configuration, since the suction port 21 is positioned higher than the electric motor 50, the distance between the bottom plate 106 and the suction port 21 can be increased. Therefore, it becomes difficult to suck foreign matter such as dust near the bottom board 106 from the suction port 21, and the reliability of the pump 10 is improved.

  A hose 100 is connected to the discharge port 22. When the main shaft 30 of the pump main body 15 rotates using the electric motor 50 as a driving force, the impeller 40 fixed to the main shaft 30 rotates. As a result, the water accumulated in the manhole 105 passes through the strainer 23 and is sucked into the suction port 21, discharged from the discharge port 22 to the hose 100, and drained. In this embodiment, the discharge port 22 is formed so as to open in the direction in which the main shaft 30 extends. That is, the discharge port 22 opens in the posture at the time of installation of the casing 20 and faces upward in the vertical direction, and the pump body 15 discharges water upward in the vertical direction.

The first float 60 is provided so as to surround the lower end of the pump body 15. The first float 60 functions as a protective member that protects the pump body 15. That is, when the pump 10 is installed, the pump body 15 can be prevented from colliding with the bottom plate 106 and being damaged. On the other hand, the second float 70 surrounds the upper end of the pump main body 15, that is, the connection portion between the pump main body 15 and the hose 100. As a result, the connection point is protected, so that when the pump 10 is installed by putting the pump 10 into the water from a steep quay or bank, even if the pump 10 collides with the quay or the like, Damage to the connection can be suppressed. In the present embodiment, the insides of the first float 60 and the second float 70 have a shape along the outer surface of the pump body 15. With such a configuration, the first float 60 and the second float 70 can be fixed by firmly contacting the pump main body 15.

  The first float 60 and the second float 70 are formed of a material having a specific gravity smaller than that of water, for example, urethane foam. Further, the buoyancy generated in the first float 60 and the second float 70 is smaller than the underwater weight of the pump body 15. That is, the first float 60 and the second float 70 may generate buoyancy to the extent that the pump 10 sinks to the bottom plate 106. With this configuration, the pump 10 sinks more slowly than in the case where the pump 10 does not include the first float 60 and the second float 70, so that the pump 10 collides with the bottom plate 106 and is damaged. Can be prevented.

  In the present embodiment, the buoyancy generated in the second float 70 is larger than the buoyancy generated in the first float 60. For this reason, since the discharge port 22 side, that is, the upper side when the pump 10 is installed is more likely to float than the suction port 21 side, that is, the lower side, the posture of the pump 10 is stabilized when the pump 10 is installed. That is, the pump 10 can sink to the bottom board 106 in a state where the final installation posture is maintained. Accordingly, the pump 10 can be suitably installed in the positional relationship shown in FIG. 1, and the pump 10 can be prevented from swinging during the settling and colliding with the quay or the like.

  In the present embodiment, the first float 60 and the second float 70 have a cylindrical shape. The diameters of the first float 60 and the second float 70 can be arbitrarily set, but are preferably 600 mm or less, and more preferably 550 mm or less. With such a size, the pump 10 can be installed in a narrow place such as the manhole 105. Since the pump 10 is configured to be installed on the bottom board 106, the first float 60 and the second float 70 have a large buoyancy compared to the conventional method in which the pump 10 is suspended from the water surface by a float. unnecessary. For this reason, as described above, the first float 60 and the second float 70 can be made compact. In the present embodiment, the distance between the bottom surface of the first float 60 and the top surface 78 of the second float 70 is set to be substantially equal to the lowest operable water level L2 of the pump body 15. In addition, the 1st float 60 and the 2nd float 70 can be made into the arbitrary shapes which can accommodate a part of pump main body 15 inside, for example, a rectangular parallelepiped shape may be sufficient as it.

  In the present embodiment, the upper surface 78 of the second float 70 is painted with a phosphorescent paint and has a phosphorescent property. According to such a configuration, even when the pump 10 is installed in a dark place such as the inside of the manhole 105, the operator can keep the water level L1 to be drained up to the upper surface 78, that is, the lowest operable water level. It can be easily visually confirmed that the pressure has dropped to L2. If the operator confirms that the water level L1 has decreased to the operable minimum water level L2 and the upper surface 78 is exposed on the water surface, the pump body 15 will break down due to idle operation if the operation of the pump body 15 is stopped. Nothing will happen. Note that a phosphorescent plate may be attached to the upper surface 78 instead of painting. As an alternative, the top surface 78 may be luminescent or light reflective. According to this configuration, the operator can easily confirm that the water level L1 has decreased to the lowest operable water level L2 using a flashlight or the like.

In this embodiment, the drop in the water level L1 can also be detected by the water level sensor 90. The water level sensor 90 includes electrodes 91 to 93. The electrode 91 is provided in the vicinity of the second float 70 of the hose 100. The electrode 92 is provided on the upper surface 78 of the second float 70. The electrode 93 is provided on the side surface of the second float 70. In the present embodiment, when energization between the electrodes 91 and 92 is cut off, that is, when the water level L1 decreases to between the electrodes 91 and 92, an alarm is issued by the control panel mounted on the pump car. Further, when the energization between the electrodes 92 and 93 is cut off, that is, when the water level L1 falls below the lowest operable water level L2, the control panel automatically stops the operation of the pump body 15. Even with such a configuration, the pump main body 15 does not fail due to idling.

  The pump 10 may have only one of a configuration in which the upper surface 78 has a phosphorescent property, a light emitting property, or a light reflective property, and a configuration in which the pump 10 includes a water level sensor 90. Of course, the pump 10 does not have to have either of these two configurations, and when the pump 10 is installed in a bright place, the operator can visually confirm the decrease in the water level L1.

  A handle 77 is attached to the upper surface 78 of the second float 70. The operator can easily perform installation work and removal work of the pump 10 by grasping the handle 77 by hand. Alternatively, the handle 77 can be easily hung or lifted by engaging the handle 77 with a hook of a heavy machine. Further, a plurality of floating balls 95 (only one is shown in FIG. 1) is connected to the second float 70. Occurrence of vortices on the water surface is suppressed by the floating ball 95.

  The connecting member 80 connects the first float 60 and the second float 70. As a result, the distance between the first float 60 and the second float 70 is kept constant, so that the first float 60 and the second float 70 are suitably fixed to the pump body 15. In the present embodiment, the connecting member 80 connects the outer edge portion of the upper surface of the first float 60 and the outer edge portion of the lower surface of the second float 70. In the present embodiment, there are a plurality of connecting members 80, and these connecting members 80 are arranged at substantially equal intervals along the circumferential direction so as to surround the pump main body 15 so as to be separated from each other. By arranging the connecting member 80 in this way, the connecting member 80 can function as a screen. As a result, since foreign matter (plastic bag or string-like material) can be prevented from being sucked into the pump body 15, the reliability of the pump 10 is improved.

  In the present embodiment, the connecting member 80 is configured such that the length can be adjusted. For this reason, the connecting member 80 can be used for various pumps 10 having different lengths in the direction of the main shaft 30. In the present embodiment, the connecting member 80 is a turnbuckle. However, any connecting means such as a rope, a chain, and a wire can be used for the connecting member 80.

  In this embodiment, a guide rail 108 is provided on the wall surface 107 of the manhole 105 along the vertical direction. The guide rail 108 is provided to guide the pump 10 to the installation position (on the bottom plate 106) when the pump 10 is installed. The first float 60 is provided with an engaging portion 69 that engages with the connecting member 80. The second float 70 is provided with an engaging portion 79 that engages with the connecting member 80. The engaging portions 69 and 79 are wheel mechanisms in this embodiment, and are fitted inside the guide rail 108. According to such a configuration, the installation work of the pump 10 is facilitated. Further, it is possible to prevent the entire pump 10 from rotating due to the rotational force generated in the pump 10 during operation of the pump 10.

  FIG. 2 is a view of the second float 70 as viewed from above. 2, the handle 77 and the water level sensor 90 shown in FIG. 1 are not shown. The second float 70 is configured to be openable and closable in a direction intersecting with the main shaft 30. In the present embodiment, the second float 70 includes a first part 71 and a second part 72, and the first part 71 and the second part 72 are connected to the pump 10 by a hinge 73. It can be opened and closed in the horizontal direction at the time of installation. By inserting the pump body 15 into the space inside one of the first part 71 and the second part 72 and closing the other, the second float 70 can be easily attached to the pump body 15; It can be easily removed by the reverse procedure. Although illustration is omitted, the first float 60 is configured to be openable and closable like the second float 70.

Furthermore, in this embodiment, a groove portion 76 is formed along the direction of the main shaft 30 on the surface 74 of the first portion 71 that is opened and closed and the surface 75 of the second portion 72 that is opened and closed. . This groove 7
6, a cable 52 connected to the electric motor 50 is inserted. According to such a configuration, the cable 52 does not oscillate or become entangled, so that damage to the electric motor 50 can be suppressed. Moreover, the installation work and removal work of the pump 10 in water are also facilitated. The groove 76 may be formed on only one of the surface 74 and the surface 75. The groove 76 may be installed on the side close to the hinge 73.

  The pump 10 described above can be used in a posture in which the main shaft 30 is in the vertical direction, that is, as a vertical shaft installation type. By using the pump 10 as a vertical shaft installation type, the pump 10 can be installed in a narrow place such as a manhole 105. Moreover, since the center of gravity of the pump 10 is located at the center of the pump 10, the stability in the horizontal direction is excellent. For this reason, the work of hanging and lifting the pump 10 is facilitated. Further, unlike the conventional method in which the pump main body is suspended by a float, the pump 10 can be installed on the bottom panel 106 and used. Therefore, the load of the pump main body 15 directly acts on the hose 100 due to a drop in water level, and the hose 100 is damaged. There is nothing. Furthermore, since the pump is not suspended from the float unlike the conventional method, the pump 10 is less likely to swing when the pump 10 is installed in water (at the time of settling). Therefore, it can suppress that the pump main body 15 collides with a quay etc. and is damaged.

  Furthermore, the pump 10 has a discharge port 22 that opens upward in the vertical direction in a posture during use, and water is discharged upward in the vertical direction. For this reason, during operation of the pump 10, the pump 10 is pressed against the bottom plate 106 side by the reaction force of the drainage from the discharge port 22. Therefore, the swinging of the pump 10 due to the rotational force of the pump body 15 is suppressed, and the pump 10 can ensure a stable posture. As a result, it is possible to suppress cable damage caused by the cable 52 connected to the electric motor 50 being entangled with the pump body 15.

  Furthermore, since the pump 10 includes the first float 60 and the second float 70, the buoyancy is increased, and the settling speed of the pump 10 can be reduced when the pump 10 is installed in water. Therefore, it is possible to suppress the lower end portion of the pump from colliding with the bottom plate and being damaged when the pump is turned on.

  Further, the pump 10 can easily attach and detach the first float 60 and the second float 70 at the installation site of the pump 10. For this reason, it can be used as either a vertical axis installation type or a horizontal axis installation type by mounting or removing the first float 60 and the second float 70 on site. Therefore, an advantageous one of horizontal axis installation or vertical axis installation can be selected according to the situation of the site, for example, the space of the installation site and the water level condition, and the operability on site is improved. The horizontal shaft installation type is a conventional method in which the pump body 15 whose main shaft 30 is in the horizontal direction is suspended in water by a float.

B. Variation:
B-1. Modification 1:
At least one of the first float 60 and the second float 70 may not exactly fit the pump body 15. For example, a cylindrical gap may be formed on the radially inner side of the first float 60 and the second float 70. In this case, a gap may be generated between the first float 60 and the second float 70 and the pump body 15, but if the connecting member 80 described above is used, the first float 60 and the second float 60 are used. It is sufficiently possible to fix the float 70 and the pump body 15.

B-2. Modification 2:
The shape of the pump body 15 described above is merely an example, and can be an arbitrary shape. For example, the discharge port 22 may open toward the direction intersecting the main shaft 30. The suction port 21 may be formed below the electric motor 50 in the posture when the pump 10 is installed. That is, the water sucked from the suction port 21 below the electric motor 50 is accelerated by the impeller 40, passes around the electric motor 50, and is discharged from the discharge port 22 above the electric motor 50.

B-3. Modification 3:
The first float 60 and the second float 70 may have a splittable configuration instead of the openable and closable configuration. For example, the second float 70 may not be provided with the hinge 73 and may be divided into two parts, that is, a first part 71 and a second part 72.

B-4. Modification 4:
The pump 10 does not necessarily have to include the second float 70. Even with such a configuration, if the buoyancy generated by the first float 60 is small, the pump 10 can be set in the installation posture and installed on the bottom board 106. Of course, the pump 10 does not necessarily have to include the first float 60. In this case, instead of the first float 60, the pump 10 may only include a protective member at the lower end in the posture when the pump 10 is installed. The protective member may be formed of a flexible member that can absorb an impact, for example, urethane. Even with such a configuration, it is possible to prevent the lower end of the pump body 15 from being damaged when the pump 10 is installed.

  The embodiments of the present invention have been described above based on some examples. However, the above-described embodiments of the present invention are for facilitating the understanding of the present invention and limit the present invention. It is not a thing. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof. In addition, any combination or omission of each constituent element described in the claims and the specification is possible within a range where at least a part of the above-described problems can be solved or a range where at least a part of the effect is achieved. It is.

DESCRIPTION OF SYMBOLS 10 ... Pump 15 ... Pump main body 20 ... Casing 21 ... Suction port 22 ... Discharge port 23 ... Strainer 30 ... Main shaft 40 ... Impeller 50 ... Electric motor 52 ... Cable 60 ... 1st float 69 ... Engagement part 70 ... 2nd float DESCRIPTION OF SYMBOLS 71 ... 1st site | part 72 ... 2nd site | part 73 ... Hinge 74,75 ... surface 76 ... Groove part 77 ... Handle 78 ... Upper surface 79 ... Engagement part 80 ... Connecting member 90 ... Water level sensor 91, 92, 93 ... Electrode 95 ... Floating ball 100 ... Hose 105 ... Manhole 106 ... Bottom panel 107 ... Wall 108 ... Guide rail L1 ... Water level L2 ... Lowest operable water level

Claims (13)

A portable drain pump,
A pump body having a main shaft, a discharge port provided on one side in the direction of the main shaft, a suction port provided on the other side of the discharge port, and an electric motor;
A portable drainage pump comprising: a protective member provided at an end of the other side of the pump body and protecting the pump body. It is a portable drainage pump according to claim 1,
The discharge port is a portable drain pump formed so as to open in the direction of the main shaft. The portable drain pump according to claim 1 or claim 2,
The said protection member is a 1st float which produces the buoyancy smaller than the underwater weight of the said pump main body, Comprising: The 1st float which surrounds the said other end part of the said pump main body is a portable drainage pump. The portable drain pump according to claim 3,
And a second float surrounding the one end of the pump body,
The sum of the buoyancy of the first float and the second float is less than the underwater weight of the pump body,
The buoyancy generated in the second float is larger than the buoyancy generated in the first float. It is a portable drainage pump according to claim 4,
Furthermore, the portable drainage pump provided with the connection member which connects the said 1st float and the said 2nd float. It is a portable drainage pump according to claim 5,
The connecting member is plural,
The plurality of connecting members are portable drainage pumps arranged so as to surround and surround the pump body. The portable drain pump according to claim 5 or claim 6,
The said connection member is a portable drainage pump comprised so that adjustment of the distance of a said 1st float and a said 2nd float was possible. It is a portable drainage pump according to any one of claims 4 to 7,
Each of the said 1st float and the said 2nd float is a portable drainage pump comprised so that division | segmentation or opening and closing was possible in the direction which cross | intersects the said main axis | shaft. The portable drain pump according to claim 8,
The second float is a portable drain pump in which a groove portion into which a cable connected to the electric motor can be inserted is formed on a surface of the second float that is divided or opened and closed. It is a portable drainage pump according to any one of claims 4 to 9,
The upper surface of the second float has a phosphorescent property, a light emitting property, or a light reflecting property. It is a portable drainage pump according to any one of claims 4 to 10,
A portable drain pump provided with a water level sensor for detecting a drop in water level in the second float. It is a portable drainage pump according to any one of claims 4 to 11,
The first float and the second float are engaged with a guide provided at a place where the portable drainage pump is installed, for guiding the portable drainage pump toward the installation position. Portable drainage pump with possible engagement. It is a portable drainage pump according to any one of claims 1 to 12,
The suction port is a portable drain pump provided between the electric motor and the discharge port.

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