Submersible pump

Abstract

To provide a submersible pump that can be maintained with the pump body lying stably. [Solution] The submersible pump 100 comprises a pump body 110 having a motor and a rotating shaft that rotates when driven by the motor, a pump casing 120 having an inlet through which water is drawn and forming a pump chamber in which an impeller 170 connected to the rotating shaft is disposed, a strainer 130 that is disposed to cover the inlet, and a protrusion 140 formed to protrude from the side of the pump body 110, and is configured so that at least the strainer 130 is removable when the submersible pump 100 is in a lying position supported by a part of the pump body 110 and the protrusion 140 so that the submersible pump 100 lies flat.

Description

[Technical Field]

[0001] The present invention relates to a submersible pump. [Background technology]

[0002] Submersible pumps have been used in construction sites for purposes such as draining spring water. Submersible pumps use a motor to draw in water and drain it, but they are equipped with an impeller for drawing in water, a pump casing that forms a pump chamber that houses the impeller, and a strainer that covers the suction port of the pump chamber to prevent foreign matter from clogging the suction port when water is being drawn in.

[0003] When performing maintenance on a submersible pump, workers remove the pump casing, strainer, and other components from the pump body. For example, workers can check whether foreign matter has entered the pump chamber or whether parts such as the impeller are worn.

[0004] For example, Patent Document 1 discloses technology related to a submersible pump that takes the above-mentioned maintainability into consideration. Specifically, in Patent Document 1, the pump casing is divided into an intermediate casing and a lower casing, and the intermediate casing is attached to the motor with bolts. The strainer is attached to the outer periphery of the lower casing, with a narrow gap between them, so as to surround the entire side of the lower casing. Bolts extend from below the bottom plate that supports the strainer and lower casing from below, through holes in the lower casing, and are screwed into the intermediate casing. This allows the lower casing, strainer, and bottom plate to be attached together. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 7-208383 Summary of the Invention [Problem to be solved by the invention]

[0006] However, with the submersible pump disclosed in Patent Document 1, when removing the pump casing and strainer located at the bottom of the submersible pump, the worker must lift the pump body including the motor and move or tilt it to perform the work. Lifting the heavy pump body to perform the work is a significant burden for the worker.

[0007] Therefore, an object of the present invention is to provide a submersible pump that allows maintenance to be performed with the pump body lying stably. [Means for solving the problem]

[0008] An underwater pump according to one aspect of the present invention comprises a pump body having a motor and a rotating shaft that rotates when driven by the motor, a pump casing that has an inlet through which water is drawn and that forms a pump chamber in which an impeller connected to the rotating shaft is disposed, a strainer that is disposed to cover the inlet, and a protrusion formed to protrude from the side of the pump body, and is configured so that at least the strainer can be attached and detached when the underwater pump is in a lying position supported by a part of the pump body and the protrusion so that the underwater pump is lying down.

[0009] In the above aspect, in the recumbent state, the strainer may be configured to be located above an imaginary line extending from a part of the pump body that supports the submersible pump toward the protrusion.

[0010] In the above aspect, the pump body may have an oil chamber filled with oil near the rotation shaft, and an oil plug in the oil chamber may be configured to be located in at least an upper region of the oil chamber when in a recumbent state.

[0011] In the above aspect, the oil plug in the oil chamber may be configured to be positioned offset from the highest position of the oil chamber in the recumbent state.

[0012] In the above aspect, the device may further include a gripping portion for gripping the submersible pump, and the submersible pump may be configured to lie down perpendicular or parallel to the gripping portion.

[0013] In the above aspect, the pump may further include a second protrusion formed to protrude from the side of the pump body, and in a second recumbent state in which the submersible pump is supported by a part of the pump body and the second protrusion so that the submersible pump lies flat, at least the strainer may be detachable, and the pump body may have an oil chamber filled with oil near the rotating shaft, and an oil plug in the oil chamber may be configured to be located in at least a lower region of the oil chamber in the second recumbent state.

[0014] In the above aspect, in the second recumbent state, the strainer may be configured to be located above an imaginary line extending from a part of the pump body that supports the submersible pump toward the second protrusion.

[0015] In the above aspect, at least a portion of the protrusion or the second protrusion may include a hose coupling. [Effects of the Invention]

[0016] According to the present invention, it is possible to provide a submersible pump that allows maintenance to be performed with the pump body lying stably. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a perspective view showing the appearance of a submersible pump 100 according to an embodiment of the present invention. [Figure 2] 1 is an exploded view showing the structure of a submersible pump 100 according to an embodiment of the present invention. [Figure 3] 1 is a side view showing a submersible pump 100 according to an embodiment of the present invention in a lying position. [Figure 4]FIG. 1 is a diagram showing a state in which maintenance of a submersible pump 100 according to an embodiment of the present invention is performed while the submersible pump 100 is laid down. [Figure 5] 1 is a view of the submersible pump 100 according to an embodiment of the present invention, viewed from above (the grip portion 150 side) in a lying position. [Figure 6] 6 is a diagram for explaining the state of the oil chamber 112A in the submersible pump 100 shown in FIG. 5. FIG. [Figure 7] FIG. 7 is a diagram illustrating a state in which the oil chamber 112A is filled with oil in the submersible pump 100 shown in FIG. 6. [Figure 8] 10 is a diagram for explaining the position where an oil plug 113 is provided in an oil chamber 112A. FIG. [Figure 9] FIG. 8 is a diagram illustrating a state in which the oil filled in the oil chamber 112A is discharged from the state of the submersible pump 100 shown in FIG. 7. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the embodiment described below is merely a specific example for carrying out the present invention and is not intended to limit the scope of the present invention. Furthermore, to facilitate understanding of the description, the same components in each drawing will be designated by the same reference numerals wherever possible, and duplicate descriptions may be omitted.

[0019] <One embodiment> [Submersible pump configuration] Fig. 1 is a perspective view showing the appearance of a submersible pump 100 according to one embodiment of the present invention, and Fig. 2 is an exploded view showing the structure of the submersible pump 100 according to one embodiment of the present invention. As shown in Fig. 1, the submersible pump 100 comprises a pump body 110, a pump casing 120, a strainer 130, a protrusion 140, and a grip 150. As shown in Fig. 2, the submersible pump 100 further comprises a wear ring 160, an impeller 170, and a suction cover 180, and has a hose coupling 190.

[0020] The pump body 110 includes a motor cover 111 and an oil casing 112, which are fastened together with bolts or the like. A motor for driving a rotating shaft and other components are disposed inside the motor cover 111, and the oil casing 112 forms an oil chamber filled with oil near the rotating shaft. The oil casing 112 is also provided with an oil plug 113 for injecting oil into the oil chamber.

[0021] The pump casing 120 has a suction port through which water is drawn, and forms a pump chamber in which an impeller 170 connected to a rotary shaft driven by the motor is disposed.

[0022] Specifically, the pump casing 120 includes an outer pump casing 121 and an inner pump casing 122, and the impeller 170 is disposed in the inner pump casing 122, with the outer pump casing 121 disposed to cover it.

[0023] When the rotary shaft is driven by the motor, the impeller 170 rotates, sucking water from an inlet provided below the pump casing 120 (pump chamber) and directing it to a discharge outlet.

[0024] A wear ring 160 may be disposed between the oil casing 112 and the pump casing 120, and a suction cover 180 may be disposed between the pump casing 120 and the strainer 130. As a result, the pump casing 120 is sandwiched between the wear ring 160 and the suction cover 180 to form a pump chamber.

[0025] The strainer 130 is disposed so as to cover the suction port provided below the pump casing 120 (pump chamber). For example, the strainer 130 is generally cup-shaped with side and bottom portions, and is configured to include slits so that foreign matter (e.g., pebbles, twigs, plastic pieces, trash, etc.) is not sucked in when water is sucked in through the suction port provided below the pump casing 120 (pump chamber).

[0026] The strainer 130 is not limited to a configuration including a slit shape, and may have a shape including, for example, a shape with multiple holes, as long as it allows water to pass through and prevents foreign matter from entering.

[0027] The protrusion 140 is formed to protrude from the side surface of the pump body 110. Here, the protrusion 140 is formed on the side surface of the oil casing 112 of the pump body 110. The protrusion 140 is configured to stably support the submersible pump 100 when the submersible pump 100 is laid down. The state in which the submersible pump 100 is laid down will be described in detail below.

[0028] The gripping portion 150 allows an operator to grip the submersible pump 100 and lift or move the submersible pump 100.

[0029] A drain hose is connected to the hose coupling 190. Water sucked in from the suction port is drained through the drain hose connected to the hose coupling 190.

[0030] [Submersible pump lying on its side] 3 is a side view showing a state in which the submersible pump 100 according to one embodiment of the present invention is laid down. As shown in FIG. 3, the submersible pump 100 is laid down (in a recumbent state).

[0031] For example, when the submersible pump 100 is laid on the floor so as to be supported by the protrusions 140, a part of the pump body 110 of the submersible pump 100 comes into contact with the floor, and the strainer 130 of the submersible pump 100 is configured to float above the floor, since the motor side is heavier than the protrusions 140. In other words, when the submersible pump 100 is laid on its side, it is tilted toward the motor side, which is heavier than the protrusions 140, and is stably supported by the protrusions 140 and a part of the pump body 110 (support point P1).

[0032] More specifically, as shown in Figure 3, when the submersible pump 100 is in a recumbent position, the strainer 130 is configured to be positioned above an imaginary line L1 extending from a part (support point P1) of the pump body 110 that supports the submersible pump 100 toward the protrusion 140.

[0033] Here, the protrusion 140 is disposed on the oil casing 112 of the pump body 110, but is not limited to this. For example, the protrusion 140 may be disposed on the motor cover 111 of the pump body 110, as long as the strainer 130 is configured to be floating above the floor when the submersible pump 100 is supported by the protrusion 140 and a part of the pump body 110 (support point P1).

[0034] In this way, when the submersible pump 100 is laid on the floor, the strainer 130 is supported by the protrusion 140 and a part of the pump body 110 (support point P1), causing the strainer 130 to float above the floor, making it easy for an operator to attach and detach the strainer 130 from the pump body 110.

[0035] 4 is a diagram showing how maintenance is performed on the submersible pump 100 according to one embodiment of the present invention while the submersible pump 100 is in a lying position. As shown in FIG. 4, the strainer 130, suction cover 180, pump casing 120, impeller 170, and wear ring 160 are removed from the pump body 110 while the submersible pump 100 is in a lying position.

[0036] More specifically, the pump body 110, the wear ring 160, the outer pump casing 121, the inner pump casing 122, the suction cover 180, and the strainer 130 are connected using bolts in through holes provided in each component, and each can be removed by removing the bolts.

[0037] As described above, when the submersible pump 100 is laid on the floor, the strainer 130 is floating above the floor, allowing the operator to easily remove the strainer 130 from the pump body 110. In addition, the wear ring 160, outer pump casing 121, inner pump casing 122, and suction cover 180 are also floating above the floor, allowing them to be easily removed from the pump body 110. Furthermore, because the submersible pump 100 is lying stably on the floor, the impeller 170 can also be easily removed.

[0038] In this way, while removing or after removing the strainer 130, suction cover 180, pump casing 120, impeller 170 and wear ring 160 from the pump body 110, the worker may perform maintenance on the submersible pump 100 by checking, for example, whether any foreign matter has entered the pump chamber or whether the impeller 170 is worn.

[0039] Furthermore, as shown in FIG. 4, the outer pump casing 121 may have protrusions 121A, 121B, and 121C.

[0040] The protrusions 121A are formed to protrude from the side surfaces of the outer pump casing 121, and, for example, when removing the outer pump casing 121 from the pump body 110, allow an operator to hook their fingers and easily move the outer pump casing 121 in a direction away from the pump body 110. A plurality of protrusions 121A may be formed, or the protrusions 121A may be formed over a wide area along the outer peripheral side surface of the outer pump casing 121, to make it easier for an operator to hold the outer pump casing 121 and remove it from the pump body 110.

[0041] The protrusions 121B and 121C are formed to align the positions and directions of the outer pump casing 121 and the pump body 110 (oil casing 112), and for example, when connecting the outer pump casing 121 to the pump body 110 (oil casing 112) after maintenance is completed, the protrusions 121B and 121C may be fitted into recesses in the pump body 110 (oil casing 112). Note that the protrusions 121B and 121C may be formed on the pump body 110 (oil casing 112) side, and a recess may be formed in the outer pump casing 121.

[0042] Figure 5 is a view of the submersible pump 100 according to one embodiment of the present invention, viewed from above (the gripping portion 150 side) in a lying position. As shown in Figure 5, in a lying position where the submersible pump 100 is supported by the protrusion 140 and a part of the pump body 110, the gripping portion 150 is configured to be perpendicular to the floor surface G1.

[0043] For example, when an operator attempts to lay the submersible pump 100 down while holding the gripping portion 150, the operator lays the submersible pump 100 down so that, when viewed from above (the gripping portion 150 side) of the submersible pump 100, the gripping portion 150 is perpendicular to the floor surface G1 and the upper side of the submersible pump 100 (the gripping portion 150 side) is close to the floor surface G1. In other words, the protrusion 140 is formed on the side of the pump body 110 that corresponds to the direction in which the gripping portion 150 is formed in the submersible pump 100. This allows the operator to stably lay the submersible pump 100 down while holding the gripping portion 150.

[0044] The gripping portion 150 placed on the submersible pump 100 is not limited to this, and as long as the operator can lay the submersible pump 100 stably, for example, the gripping portion 150 may be configured to be parallel to the floor surface G1.

[0045] For example, when an operator tries to lay the submersible pump 100 down while holding the gripping portion 150, the operator lays the submersible pump 100 down so that the gripping portion 150 is parallel to the floor surface G1 when viewed from above the submersible pump 100 (the gripping portion 150 side) and the top side of the submersible pump 100 (the gripping portion 150 side) is close to the floor surface G1. In other words, the protrusion 140 is formed on the side surface of the pump body 110 that corresponds to the direction perpendicular to the direction in which the gripping portion 150 is formed in the submersible pump 100.

[0046] [Oil chamber configuration] Figure 6 is a diagram for explaining the state of the oil chamber 112A in the submersible pump 100 shown in Figure 5. As shown in Figure 6, the oil casing 112 forms the oil chamber 112A filled with oil near the rotating shaft, and further includes an oil plug 113 for injecting oil into the oil chamber 112A.

[0047] When the submersible pump 100 is in a lying position due to being supported by the protrusion 140, the oil plug 113 is configured to be located at least in the upper region of the oil chamber 112A.

[0048] This makes it easier for an operator to inject oil into the oil chamber 112A from the oil plug 113 when the submersible pump 100 is in a lying position.

[0049] Figure 7 is a diagram illustrating a state in which oil is filled into the oil chamber 112A in the submersible pump 100 shown in Figure 6. As shown in Figure 7, the oil chamber 112A is filled with oil injected from the oil plug 113.

[0050] For example, the oil plug 113 is configured to be positioned offset from the highest position of the oil chamber 112A when the submersible pump 100 is in a recumbent state. If the oil plug 113 is positioned in the highest position of the oil chamber 112A, an operator can fill the oil chamber 112A with oil when the submersible pump 100 is in a recumbent state. The oil filled in the oil chamber 112A may expand depending on the temperature, and if the oil chamber 112A is filled to the brim, the oil chamber 112A (oil casing 112) may be deformed by the pressure of the expansion of the oil.

[0051] In other words, the oil plug 113 is configured to be positioned offset from the highest position of the oil chamber 112A when the submersible pump 100 is in a horizontal position, so that the operator cannot inject oil so that the oil chamber 112A becomes full when the submersible pump 100 is in a horizontal position, and it is possible to prepare for the expansion of the oil.

[0052] Figure 8 is a diagram illustrating the position of the oil plug 113 in the oil chamber 112A. As shown in Figure 8, the oil plug 113 is provided in a predetermined range 112B in the upper region of the oil chamber 112A when the submersible pump 100 is in a recumbent position, for example.

[0053] More specifically, the oil plug 113 is preferably located at a position in the upper region of the oil chamber 112A, taking into consideration the volume and shape of the oil chamber 112A, the expansion rate of the oil injected into the oil chamber 112A, etc., but as described above, it is preferably configured to be positioned away from the highest position in the oil chamber 112A and within a predetermined range 112B that is approximately two-thirds of the way from the highest position side of the oil chamber 112A.

[0054] As described above, with the submersible pump 100 according to one embodiment of the present invention, when the submersible pump 100 is laid down on the floor, the strainer 130 is supported by the protrusion 140 and a part of the pump body 110 (support point P1), causing the strainer 130 to float above the floor. This allows an operator to easily attach and detach the strainer 130 from the pump body 110, and allows the submersible pump 100 to be laid stably for maintenance. As a result, the burden on the operator of lifting, moving, or tilting the heavy pump body 110 during maintenance can be reduced.

[0055] 1, 4, 6, and 7, the protrusion 140 is a single member having two legs, but the shape of the protrusion 140 is not limited to this. For example, it may be two protrusions (corresponding to the two legs of the protrusion 140) protruding from the side of the pump body 110, or any other number and shape may be used as long as the submersible pump 100 is stably supported by a part of the pump body 110 and the protrusions when the submersible pump 100 is laid down.

[0056] Furthermore, the protrusion 140 is provided to provide stable support when the submersible pump 100 is laid down, but if, for example, a part of the hose coupling 190 and a part of the pump body 110 (such as a part that forms a through hole for passing a bolt) can perform the function of the protrusion 140, there is no need to provide a separate dedicated protrusion 140.

[0057] <Other> Figure 9 is a diagram illustrating the state in which the oil filled in the oil chamber 112A is discharged from the state of the submersible pump 100 shown in Figure 7. As shown in Figure 9, the submersible pump 100 is supported by a part (support point P2) (second protrusion) of the hose coupling 190 and a part (support point P3) (second protrusion) of the pump body 110, and is in a state in which the submersible pump 100 is lying on the floor surface G2 (second recumbent state).

[0058] In this way, by supporting the underwater pump 100 by a part of the hose coupling 190 (support point P2) and a part of the pump body 110 (support point P3), the oil plug 113 is positioned in the lower region of the oil chamber 112A.

[0059] For example, in the state of the submersible pump 100 shown in Figure 9, the oil that had filled the oil chamber 112A can be discharged from the oil plug 113. If it is necessary to further discharge the remaining oil, the operator can easily discharge the oil from the oil plug 113 by using support point P3 as a fulcrum and lifting the hose coupling 190 (support point P2).

[0060] In this case, the oil plug 113 is preferably configured to be located at least in the lower region of the oil chamber 112A when the submersible pump 100 is in the second recumbent state, but is preferably configured to be located away from the lowest point of the oil chamber 112A. This is because if the oil plug 113 were located at the lowest point of the oil chamber 112A when the submersible pump 100 is in the second recumbent state, there is a risk that the oil plug 113 would come into contact with the floor surface G2 and become blocked.

[0061] Here, the submersible pump 100 is supported by a part of the hose coupling 190 (support point P2) and a part of the pump body 110 (support point P3), but this is not limited to this and the submersible pump 100 may be configured to have a protrusion (second protrusion) protruding from the side of the pump body 110 and to be supported by this protrusion (second protrusion).

[0062] Furthermore, even in the state of the submersible pump 100 shown in Figure 9 (second recumbent state), it is preferable that the strainer 130 is configured to be floating above the floor surface G2, which allows an operator to easily attach and detach the strainer 130 from the pump body 110 and allows the submersible pump 100 to be laid stably for maintenance.

[0063] The above-described embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The elements of the embodiments, as well as their arrangement, materials, conditions, shapes, sizes, etc., are not limited to those illustrated and can be modified as appropriate. Furthermore, configurations shown in different embodiments can be partially substituted or combined with each other. [Explanation of symbols]

[0064] 100...Submersible pump, 110...Pump body, 111...Motor cover, 112...Oil casing, 112A...Oil chamber, 112B...Predetermined range, 113...Oil plug, 120...Pump casing, 121...Outer pump casing, 121A, 121B, 121C...Protrusion, 122...Inner pump casing, 130...Strainer, 140...Protrusion, 150...Gripping portion, 160...Wear ring, 170...Impeller, 180...Suction cover, 190...Hose coupling, G1, G2...Floor surface, L1...Imaginary line, P1, P2, P3...Support point

Claims

1. 1. A submersible pump, comprising: a pump body having a motor and a rotary shaft that is rotated by the driving of the motor; a pump casing having a suction port through which water is drawn and forming a pump chamber in which an impeller connected to the rotary shaft is disposed; a strainer disposed to cover the suction port; a protrusion formed to protrude from a side surface of the pump body, The submersible pump is configured so that at least the strainer is detachable in a horizontal position in which the submersible pump is supported by a part of the pump body and the protrusion so that the submersible pump lies flat. Submersible pump.

2. In the recumbent state, the strainer is configured to be located above an imaginary line extending from a part of the pump body supporting the submersible pump toward the protrusion.

2. The submersible pump of claim 1.

3. the pump body has an oil chamber filled with oil near the rotary shaft, The oil plug in the oil chamber is configured to be located at least in an upper region of the oil chamber in the recumbent state.

2. The submersible pump of claim 1.

4. The oil plug in the oil chamber is configured to be positioned offset from the highest position of the oil chamber in the recumbent state.

4. The submersible pump of claim 3.

5. Further provided is a gripping portion for gripping the submersible pump, The submersible pump is configured to be in the lying state perpendicular or parallel to the gripping portion.

2. The submersible pump of claim 1.

6. The pump further includes a second protrusion formed to protrude from a side surface of the pump body, In a second recumbent state in which the submersible pump is supported by a part of the pump body and the second protrusion so that the submersible pump lies down, at least the strainer is configured to be detachable, the pump body has an oil chamber filled with oil near the rotary shaft, The oil plug in the oil chamber is configured to be located at least in a lower region of the oil chamber in the second recumbent state.

2. The submersible pump of claim 1.

7. In the second recumbent state, the strainer is configured to be located above an imaginary line extending from a part of the pump body supporting the submersible pump toward the second protrusion.

7. The submersible pump of claim 6.

8. At least a portion of the protrusion or the second protrusion includes a hose coupling.

7. The submersible pump of claim 6.

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