JP7213756B2 - pump - Google Patents

Description

The present invention relates to pumps.

2. Description of the Related Art When pumping up liquid such as groundwater and crude oil from underground, for example, a pump (liquid sucking device) disclosed in Patent Document 1 is used.

As one of such pumps, a vertically extending cylindrical production pipe supporting a motor stator at the bottom thereof and an inner element extending vertically and inserted into the production pipe are provided. I have something ready.
The inner element has a vertically extending motor shaft, a pump shaft, a plurality of pump bodies, and magnetic components.

The pump shaft extends vertically and has its lower end connected to the upper end of the motor shaft. The plurality of pump main bodies are provided on the outer peripheral surface of the pump shaft and arranged at intervals in the vertical direction. The magnetic component is provided on the outer peripheral surface of the motor shaft and faces the motor stator.
In the pump constructed as described above, liquid is pumped up from the underground to the ground by rotating the pump shaft and the plurality of pump main bodies by the electric motor composed of the motor stator and the magnetic parts.

JP-A-4-124478

In the above-described pump, one pump shaft is provided with a plurality of pump bodies, and one electric motor rotates the plurality of pump bodies.
For this reason, for example, when the pump shaft is damaged or the electric motor fails, it becomes difficult to pump up the liquid from the underground to the ground, which may reduce the operating rate of the pump.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pump capable of suppressing a decrease in operating rate.

In order to solve the above problems, a pump according to an aspect of the present invention has a configuration in which a plurality of rotating units and diffuser units are alternately stacked in a vertical direction from underground to above ground. a tubular portion extending in the vertical direction and accommodating the inner element inside; and a support portion protruding radially inward from the lower end of the tubular portion and supporting the lower end of the inner element. a production pipe having a ring shape, wherein the rotation unit has a ring-shaped fixed portion whose position is regulated by the inner peripheral surface of the production pipe; a radial bearing provided between an inner peripheral surface of the fixed portion and an outer peripheral surface of the rotating portion; a radial bearing provided between the inner peripheral surface of the rotating portion; a rotor protruding radially inward and rotating together with the rotating part; and the diffuser unit has an annular shape and is positioned directly below the production pipe. and a plurality of diffuser vanes provided on the inner peripheral surface of the annular member and protruding radially inward from the inner peripheral surface of the annular member.

According to the present invention, the stationary part, the rotating part, the rotating unit having the rotating blades rotating together with the rotating part, and the diffuser unit disposed on the upper surface of the stationary part and having a plurality of diffuser vanes are arranged from underground to the ground. By providing inner elements having a structure in which a plurality of inner elements are alternately stacked in a direction, it is possible that a rotating portion or a fixed portion that constitutes a part of the rotating units among the plurality of rotating units malfunctions and causes the rotating blades to rotate. Even if it becomes impossible, it is possible to pump underground liquid to the surface by rotating the rotor blades of other rotating units that have rotating parts and fixed parts that are not out of order. As a result, it is possible to suppress a decrease in the operation rate of the pump.

In order to solve the above problems, a pump according to an aspect of the present invention has a configuration in which a plurality of rotating units and diffuser units are alternately stacked in a vertical direction from underground to above ground. and a wire wound around the outer peripheral surface of the inner element to integrate the plurality of rotating units and the plurality of diffuser units, wherein the rotating unit is in contact with the wire. a ring-shaped fixed portion arranged inside the fixed portion, and a ring-shaped rotating portion disposed between the inner peripheral surface of the fixed portion and the outer peripheral surface of the rotating portion; and a rotary blade provided on the inner peripheral surface of the rotating portion, protruding radially inward from the inner peripheral surface of the rotating portion, and rotating together with the rotating portion. An annular member that has an annular shape that contacts the wire and is arranged on the upper surface of the fixing portion positioned directly below; and a plurality of inwardly projecting diffuser vanes.

According to the present invention, the stationary part, the rotating part, the rotating unit having the rotating blades rotating together with the rotating part, and the diffuser unit disposed on the upper surface of the stationary part and having a plurality of diffuser vanes are arranged from underground to the ground. By providing inner elements having a structure in which a plurality of inner elements are alternately stacked in a direction, it is possible that a rotating portion or a fixed portion that constitutes a part of the rotating units among the plurality of rotating units malfunctions and causes the rotating blades to rotate. Even if it becomes impossible, it is possible to pump underground liquid to the surface by rotating the rotor blades of other rotating units that have rotating parts and fixed parts that are not out of order. As a result, it is possible to suppress a decrease in the operation rate of the pump.
Also, by providing a wire that integrates multiple rotating units and multiple diffuser units, the transportability of the pump can be improved since it is not necessary to prepare a long production pipe.

Further, in the pump according to the aspect of the present invention, the first flow path extending in the vertical direction is formed in the center of the rotating unit, and the plurality of diffuser vanes are formed in the center of the diffuser unit. and extending in the vertical direction and facing the first flow channel in the vertical direction.

Thus, the first flow path formed in the center of the rotating unit and extending in the vertical direction, and the first flow path formed in the center of the diffuser unit located inside the plurality of diffuser vanes, extending in the vertical direction and extending in the vertical direction. By having the first flow path and the second flow path facing each other, when the liquid pumped up from the underground contains a solid matter (foreign matter), the solid matter (foreign matter) is discharged through the first and second flow paths. Objects (foreign objects) can be guided to the ground.

Further, in the pump according to the aspect of the present invention, a first through hole defined by an inner peripheral surface of the rotating portion, extending in the vertical direction, and accommodating the rotating blade is provided in the center of the rotating portion. is formed in the center of the annular member, is defined by the inner peripheral surface of the annular member, extends in the vertical direction, accommodates the plurality of diffuser vanes, and has a diameter equal to the first through-hole A second through-hole having a diameter equal to the diameter of the hole is formed, and the rotation unit and the diffuser unit are arranged so that the central axis of the first through-hole and the central axis of the second through-hole are aligned. May be stacked.

Thus, the central axis of the first through hole formed in the center of the rotating part and the central axis of the second through hole formed in the center of the annular member and having the same diameter as the first through hole By stacking the rotation unit and the diffuser unit so that the .DELTA. This makes it easier to move the liquid in the direction from underground to above ground.

Moreover, the pump according to the aspect of the present invention may have a bolt that penetrates the annular member in the vertical direction and fixes the annular member to the fixing portion.

In this way, the position of the diffuser unit with respect to the rotating unit can be regulated by having the bolts that penetrate the annular member in the vertical direction and fix the annular member to the fixed portion.

Further, in the pump according to the aspect of the present invention, the inner element includes a unit mechanism having one rotation unit and one diffuser unit fixed with the bolt, and the bolt, and the unit mechanism is stacked in the vertical direction. contains the configuration
The unit mechanism may have a ring-shaped first seal member arranged outside the bolt between the annular member and the fixed portion.

By having the ring-shaped first seal member arranged outside the bolt between the annular member and the fixed portion, the outside of the boundary between the annular member and the fixed portion can be prevented from underground. Leakage of the pumped liquid can be suppressed.

Moreover, in the pump according to the aspect of the present invention, the inner element may have a ring-shaped second seal member arranged between the vertically stacked unit mechanisms.

By having the ring-shaped second sealing member arranged between the unit mechanisms in this way, it is possible to suppress the leakage of the liquid pumped up from the underground to the outside between the unit mechanisms.

Further, in the pump according to the aspect of the present invention, a bolt may be provided to penetrate the annular member in the vertical direction and fix the annular member to the fixing portion, and the inner element may be fixed by the bolt. each one of the rotation unit and the diffuser unit, and the bolts are arranged in the vertically stacked configuration, and the inner element is a member of the vertically stacked unit mechanisms. a ring-shaped second sealing member disposed therebetween, said production pipe being flexible, said second sealing member being made of an elastic material and extending in said vertical direction; The thickness may be such that a gap can be formed between the unit mechanisms stacked on top of each other.

In this way, the flexible production pipe, the ring-shaped second sealing member made of a material having elasticity and having a thickness capable of forming a gap between the vertically stacked unit mechanisms, By having the , it is possible to allow the portion of the second seal member disposed between the unit mechanisms to function as a joint.
Thereby, when the production pipe is slightly inclined, the outer shape of the inner element can follow the shape of the inclined production pipe.

Further, in the pump according to the aspect of the present invention, the rotor blades are provided at intervals in the circumferential direction of the inner peripheral surface of the rotating portion, and are arranged outside the first flow path. wing bodies, and the plurality of wing bodies may extend in the vertical direction and have a streamlined shape.

In this way, a plurality of blade bodies configured as described above can be used as the rotary blade.

Moreover, in the pump according to the aspect of the present invention, the rotor blade may be an inward screw having the first flow path formed in the center.

Thus, the inward screw configured as described above can be used as the rotor blade.

Further, the pump according to the aspect of the present invention may include a control section that rotates the rotor blades forward or backward by controlling an electric motor including the fixed section and the rotating section.

With the control unit having such a configuration, when the inner element is accommodated in the production pipe filled with liquid, the forward rotation of the rotor blades generates a force to move the inner element downward. , the installation time of the inner element can be shortened.
In addition, when the inner element is pulled up from the inside of the production pipe, by rotating the rotor in the reverse direction, a force is generated to move the inner element upward, so the time required to pull up the inner element can be shortened.

Further, in the pump according to the aspect of the present invention, the fixed part has a coil and a coil housing part that houses the coil, and the rotating part houses a permanent magnet and the permanent magnet. and a magnet housing portion.

In this way, the coil can be protected from the liquid by having the coil accommodating portion that accommodates the coil. Moreover, the permanent magnets can be protected from the liquid by having the magnet accommodating portion that accommodates the permanent magnets.

ADVANTAGE OF THE INVENTION According to this invention, the fall of the operating rate of a pump can be suppressed.

1 is a longitudinal sectional view showing a schematic configuration of a pump according to a first embodiment of the invention; FIG. FIG. 2 is a vertical cross-sectional view of a portion of the pump shown in FIG. 1 surrounded by a region A; 3 is an enlarged cross-sectional view of a portion of the pump shown in FIG. 2, which is surrounded by a region D; FIG. FIG. 3 is a plan view of the pump shown in FIG. 2 in which a portion surrounded by a region B is viewed from D; FIG. 3 is a plan view of a portion of the pump shown in FIG. 2 surrounded by a region C viewed from D; It is the longitudinal cross-sectional view which expanded the lower part of the pump which concerns on the 2nd Embodiment of this invention. FIG. 7 is a diagram for explaining an inward screw shown in FIG. 6; is. It is the longitudinal cross-sectional view which expanded the lower part of the pump which concerns on the 3rd Embodiment of this invention. It is the longitudinal cross-sectional view which expanded the lower part of the pump which concerns on the 4th Embodiment of this invention. FIG. 10 is an enlarged cross-sectional view of a portion of the pump shown in FIG. 9 surrounded by a region E;

Embodiments to which the present invention is applied will be described in detail below with reference to the drawings.

(First embodiment)
A pump 10 according to a first embodiment will be described with reference to FIGS. 1 to 5. FIG. ₁ and 2, the Z direction is the vertical direction, O1 is the central axis of the production pipe 11 (hereinafter referred to as "central axis _O1 "), and _O2 is the central axis of the inner element 12 (hereinafter referred to as "central axis O ₂ ”) are shown respectively.
5, Cd is the circumferential direction of the rotating portion 47 (hereinafter referred to as "circumferential direction Cd"), _R1 is the direction in which the rotor blade 44 rotates forward (hereinafter referred to as "positive direction _R1 "), R ₂ indicates the direction in which the rotor blades 44 rotate in the reverse direction (hereinafter referred to as “reverse direction R ₂ ”).
1 and 2 correspond to the E ₁ -E ₂ line shown in FIGS. 4 and 5. FIG. 1 and 2 also show a drilling pipe 5 which is not a component of the pump 10 . In FIGS. 1 to 5, the same components are denoted by the same reference numerals.

The pump 10 has a production pipe 11 , an inner element 12 and a controller 13 .
The production pipe 11 is tubular and extends in the Z direction. Production pipe 11 does not have flexibility. The production pipe 11 is housed inside a cylindrical drilling pipe 5 .

The drilling pipe 5 has a tubular portion 6 and a support portion 7 . When the drilling pipe 5 is placed underground 1, the cylindrical portion 6 extends in the Z direction. The support portion 7 has a ring shape and protrudes radially inward from the inner peripheral surface 6 a of the lower end portion of the cylindrical portion 6 . A liquid introduction hole 7</b>A is formed in the center of the support portion 7 to guide the liquid present in the underground 1 to the lower end of the inner element 12 . The liquid introduction hole 7A extends in the Z direction.

The production pipe 11 has a tubular portion 21 and a support portion 22 .
The tubular portion 21 extends in the Z direction. The support portion 22 has a ring shape and is provided inside the lower end portion of the cylindrical portion 21 . The support portion 22 protrudes radially inward from the lower end of the cylindrical portion 21 .
The support 22 is arranged on the upper surface 7 a of the support 7 of the drilling pipe 5 . The production pipe 11 is thereby supported by the drilling pipe 5 . The support portion 22 has an upper surface 22a that supports the lower end of the inner element 12. As shown in FIG.

The inner element 12 is housed inside the production pipe 11 . The inner element 12 has multiple unit mechanisms 25 and a second seal member 27 .
A plurality of unit mechanisms 25 are stacked in the Z direction.
The unit mechanism 25 has a rotating unit 31 , a diffuser unit 32 , a plurality of bolts 34 and a first seal member 36 .

The rotation unit 31 has an electric motor 41 and a rotary blade 44 .

The electric motor 41 has a fixed portion 46 , a rotating portion 47 and a pair of radial bearings 42 . The fixed portion 46 has a coil housing portion 51 and a coil 52 .
The coil accommodating portion 51 is an annular member, and its position is restricted by the inner peripheral surface 21 a of the cylindrical portion 21 . The coil accommodating portion 51 has a rectangular shape when cut along a plane that passes through the central axis _O2 and is parallel to the Z direction. Inside the coil housing portion 51, a housing space 51A arranged in the circumferential direction Cd is formed.

A ring-shaped first concave portion 51B is formed in a portion located on the outer peripheral side of the upper surface of the coil accommodating portion 51 .
A first bolt hole 51C for fastening a bolt 34 is formed in a portion of the upper surface of the coil housing portion 51 located inside the first recess 51B. A plurality of first bolt holes 51C are formed in the circumferential direction Cd.

A second concave portion 51</b>D in which a part of the second seal member 27 is accommodated is formed on the outer peripheral side of the lower surface 51 a of the coil accommodating portion 51 .
Among the plurality of unit mechanisms 25 , the lower surface 51 a of the coil housing portion 51 forming the lower end portion of the inner element 12 is in contact with the upper surface 22 a of the support portion 22 .

The coil 52 is housed in the housing space 51A and arranged in the circumferential direction Cd.
In this manner, by providing the coil housing portion 51 having the housing space 51A formed therein and arranging the coil 52 in the housing space 51A, the coil 52 can be protected from the liquid.
The central axis of the fixed portion 46 configured as described above coincides with the central axis _O2 .

The rotating portion 47 has a magnet housing portion 55 and permanent magnets 56 .
The magnet housing portion 55 is arranged inside the fixed portion 46 . The magnet housing portion 55 is annular. The magnet housing portion 55 has a rectangular shape when cut along a plane that passes through the central axis _O2 and is parallel to the Z direction.

Between the magnet housing portion 55 and the coil housing portion 51 in the radial direction of the magnet housing portion 55, an annular space 48 for arranging the pair of radial bearings 42 is formed.
Inside the magnet housing portion 55, a housing space 55A is formed in the circumferential direction Cd.
A first through hole 59 is formed in the inner peripheral surface 55 c of the magnet housing portion 55 at the center of the magnet housing portion 55 .
The first through hole 59 extends in the Z direction. The first through hole 59 faces the liquid introduction hole 7A in the Z direction.

Among the plurality of unit mechanisms 25 , the lower surface 55 a of the magnet housing portion 55 forming the lower end portion of the inner element 12 is in contact with the upper surface 22 a of the support portion 22 .
The permanent magnet 56 is housed in the housing space 55A and arranged in the circumferential direction Cd.
Thus, by providing the magnet housing portion 55 with the housing space 55A formed therein and arranging the permanent magnets 56 in the housing space 55A, the permanent magnets 56 can be protected from the liquid.
The central axis of the rotating portion 47 configured as described above coincides with the central axis _O2 .

The pair of radial bearings 42 are provided in the space 48 while being connected to the inner peripheral surface 51 b of the coil accommodating portion 51 and the outer peripheral surface 55 b of the magnet accommodating portion 55 . The pair of radial bearings 42 are spaced apart in the Z direction.
A pair of radial bearings 42 rotatably supports a rotating portion 47 .

The rotor blade 44 has a plurality of blade bodies 61 . A plurality of wing bodies 61 are provided on the inner peripheral surface 55 c of the magnet housing portion 55 . The plurality of wing bodies 61 are arranged at intervals in the circumferential direction Cd. The plurality of wing bodies 61 protrude radially inward from the inner peripheral surface 55c of the magnet housing portion 55 and extend in the Z direction. The plurality of wing bodies 61 are arranged radially around the central axis _O2 . The shape of the plurality of blade bodies 61 is streamlined.

The plurality of wing bodies 61 have tip surfaces 61A arranged on the central axis _O2 .
A first flow path 63 extending in the Z direction is formed inside the tip surfaces 61A of the plurality of blade bodies 61 . The first channel 63 faces the liquid introduction hole 7A in the Z direction. The first flow path 63 is arranged in the center of the rotation unit 31 . The central axis of the first flow path 63 coincides with the central axis _O2 .

By having the first flow path 63 configured as described above, when solid matter (foreign matter) is contained in the liquid, the solid matter (foreign matter) is moved together with the liquid in the direction from the underground 1 to the aboveground 2. can be made

Channels 65 through which underground liquid passes are formed between the plurality of wing bodies 61 . A plurality of flow paths 65 are arranged in the circumferential direction Cd.
The plurality of wing bodies 61 configured as described above rotate in the same direction (forward direction R ₁ or reverse direction R ₂ ) as the rotating portion 47 when the rotating portion 47 is rotated.

The rotating unit 31 configured as described above compresses the underground liquid passing through the flow path 65 by rotating in the positive direction _R1 . The liquid compressed by the rotating unit 31 is supplied to the diffuser unit 32 positioned directly above the rotating unit 31 .

The diffuser unit 32 has an annular member 71 and a plurality of diffuser vanes 73 .
The annular member 71 has an annular shape, and its position is restricted by the inner peripheral surface 21 a of the cylindrical portion 21 . The annular member 71 is arranged on the upper surface 51c of the coil housing portion 51 located directly below. Thereby, the lower surface 71 a of the annular member 71 is in contact with the upper surface 51 c of the coil accommodating portion 51 . A gap is formed between the lower surface 71 a of the annular member 71 and the upper surface 55 d of the magnet housing portion 55 .

A second through hole 76 defined by the inner peripheral surface 71c of the annular member 71 and extending in the Z direction is formed in the center of the annular member 71 . The size of the diameter of the second through hole 76 is equal to the size of the diameter of the first through hole 59 .
The diffuser unit 32 is stacked on the rotating unit 31 so that the central axis of the first through hole 59 and the central axis of the second through hole 76 are aligned.

In this manner, the rotation unit 31 and the diffuser unit 32 are rotated in the Z direction so that the central axis of the first through hole 59 and the central axis of the second through hole 76 formed in the center of the annular member 71 coincide with each other. It is possible to prevent the formation of a step at the boundary between the inner peripheral surface 55c of the magnet accommodating portion 55 and the inner peripheral surface 71c of the annular member 71. This makes it easier to move the liquid in the direction from underground 1 to above ground 2 .

The annular member 71 is formed with a third recess 71A, a fourth recess 71B, a fifth recess 71C, and a second bolt hole 71D.
The third concave portion 71A is a ring-shaped concave portion and is formed on the outer peripheral side of the lower surface 71a of the annular member 71 . The third recess 71A faces, in the Z direction, the first recess 51B formed in the coil housing portion 51 located directly below.

The fourth concave portion 71B is a ring-shaped concave portion and is formed on the outer peripheral side of the upper surface 71b of the annular member 71 . The fourth recessed portion 71B faces the second recessed portion 51D formed in the coil accommodating portion 51 arranged directly above in the Z direction.

The fifth concave portion 71C is formed on the upper surface 71b side of the annular member 71 . The fifth recess 71C is arranged inside the fourth recess 71B and above the first bolt hole 51C.
The fifth recess 71C accommodates the entire head 34A of the bolt 34 fastened to the first bolt hole 51C.

A plurality of second bolt holes 71D are formed so as to penetrate a portion of the annular member 71 located below the fifth recess 71C. The second bolt hole 71D communicates with the fifth recess 71C and the first bolt hole 51C in the Z direction. A shaft portion 34B of the bolt 34 is arranged in the second bolt hole 71D.

A plurality of diffuser vanes 73 are provided on the inner peripheral surface 71c of the annular member 71 while being spaced apart in the circumferential direction. The plurality of diffuser vanes 73 protrude radially inward from the inner peripheral surface 71c of the annular member 71 . A plurality of diffuser vanes 73 are accommodated in second through holes 76 .
The plurality of diffuser vanes 73 have the same configuration as the blade body 61 described above.

A second flow path 79 extending in the Z direction is formed inside the plurality of diffuser vanes 73 . The second channel 79 faces the first channel 63 in the Z direction.
By having the second flow path 79 configured as described above, solid matter (foreign matter) that has passed through the first flow path 63 can be guided to the ground 2 side.

Channels 82 for straightening the compressed liquid are formed between the plurality of diffuser vanes 73 . A plurality of flow paths 82 are arranged in the circumferential direction Cd. The plurality of diffuser vanes 73 configured as described above do not rotate.

The liquid that has passed through the diffuser unit 32 configured as described above is supplied to the rotating unit 31 positioned directly above.

The bolt 34 has a head portion 34A and a shaft portion 34B. The shaft portion 34B is integrated with the head portion 34A and extends in the Z direction. When the bolt 34 is fastened to the first bolt hole 51C, the head 34A is arranged in the fifth recess 71C. In this state, the remaining portion of the shaft portion 34B is arranged in the second bolt hole 71D.
A plurality of bolts 34 secure the diffuser unit 32 to the fixed portion 46 . Therefore, the diffuser unit 32 does not rotate even when the rotating portion 47 rotates.

Thus, the position of the diffuser unit 32 with respect to the rotation unit 31 can be regulated by having the bolt 34 that penetrates the annular member 71 in the Z direction and fixes the annular member 71 to the fixing portion 46 .

The first seal member 36 is ring-shaped and arranged in the first and third recesses 51B and 71A. Thereby, the first seal member 36 is provided between the annular member 71 and the fixing portion 46 . The first seal member 36 is arranged outside the bolt 34 .

By having the ring-shaped first seal member 36 arranged outside the bolt 34 between the annular member 71 and the fixed portion 46 in this way, the annular member 71 and the fixed portion 46 can be It is possible to suppress the leakage of the liquid pumped up from the underground 1 to the outside of the boundary.

As described above, the unit mechanism 25 is configured such that the diffuser unit 32 is stacked on the rotating unit 31 .
As a result, the inner element 12 in which a plurality of unit mechanisms 25 are stacked in the Z direction has a configuration in which a plurality of rotating units 31 and diffuser units 32 are alternately stacked in the direction from the underground 1 to the ground 2. It is

The second seal member 27 is ring-shaped and made of an elastic material (eg, rubber). The second seal member 27 is arranged in the second and fourth recesses 51D and 71B located between the unit mechanisms 25. As shown in FIG.
By having the second seal member 27 having such a configuration, it is possible to suppress leakage of the liquid pumped up from the underground 1 to the outside between the unit mechanisms 25 .

A control unit 13 is provided on the ground 2 . Control unit 13 is electrically connected to coil 52 . The control unit 13 controls the rotation speed of the rotation unit 47 and the rotation direction (forward direction R ₁ or reverse direction R ₂ ) of the rotation unit 47 .

With the controller 13 configured as described above, when the inner element 12 is accommodated in the production pipe 11 filled with liquid, the rotary blade 44 is rotated forward (rotated in the forward direction _R1 ). , a force for moving the inner element 12 downward is generated, so that the installation time of the inner element 12 can be shortened.
In addition, when the inner element 12 is pulled up from the inside of the production tube 11, by rotating the rotary blade 44 in the reverse direction (rotating in the reverse direction _R2 ), a force is generated to move the inner element 12 upward. The time required for pulling up can be shortened.

According to the pump 10 of the first embodiment, the electric motor 41 including the fixed portion 46 and the rotating portion 47, and the rotary unit 31 having the rotary blades 44 that rotate together with the rotating portion 47, are fixed on the fixed portion 46, By providing the diffuser unit 32 having a plurality of diffuser vanes 73 and the inner element 12 having a configuration in which a plurality of the diffuser vanes 73 are alternately stacked in the direction from the underground 1 to the ground 2, some of the plurality of rotating units 31 Even if the electric motor 41 that constitutes the rotating unit 31 fails and cannot rotate the rotating blade 44, the rotating blade 44 of the other rotating unit 31 having the electric motor 41 that is not malfunctioning can be rotated. , the liquid in the underground 1 can be pumped up to the ground 2. Thereby, the fall of the operating rate of the pump 10 can be suppressed.

(Second embodiment)
The pump 85 of the second embodiment will be described with reference to FIGS. 6 and 7. FIG. Also shown in FIG. 6 is the drill pipe 5 which is not a component of the pump 85 . In FIG. 6, the same components as those of the structure shown in FIG. 2 are denoted by the same reference numerals. In FIG. 7, the same components as those of the structure shown in FIG. 6 are denoted by the same reference numerals.

The pump 85 is configured in the same manner as the pump 10 except that it has an inner element 86 instead of the inner element 12 that constitutes the pump 10 of the first embodiment.
The inner element 86 is configured in the same manner as the inner element 12 except that it has a plurality of unit mechanisms 91 instead of the plurality of unit mechanisms 25 that constitute the inner element 12 .

The unit mechanism 91 is similar to the unit mechanism 25 except that it has a rotating unit 92 instead of the rotating unit 31 that constitutes the unit mechanism 25 described in the first embodiment.

The rotating unit 92 is configured in the same manner as the rotating unit 31 described in the first embodiment, except that it has a rotating blade 95 instead of the rotating blade 44 that constitutes the rotating unit 31 .
The rotor blade 95 is an inward screw 96 with the first flow path 63 arranged in the center. An outer peripheral edge of the inward screw 96 is fixed to the inner peripheral surface 55 c of the magnet housing portion 55 . The inward screw 96 is housed in the first through hole 59 . The inward screw 96 rotates together with the rotating portion 47 when the rotating portion 47 rotates.

The pump 85 of the second embodiment having such a configuration can obtain the same effect as the pump 10 of the first embodiment.

(Third embodiment)
A pump 100 according to a third embodiment will be described with reference to FIG. Also shown in FIG. 8 is a drill pipe 5 which is not a component of the pump 100 . In FIG. 8, the same components as those of the structure shown in FIG. 2 are denoted by the same reference numerals.

The pump 100 has a wire 102 in place of the production pipe 11 that constitutes the pump 10 of the first embodiment, and projections projecting outward from the outer peripheral surfaces of the coil housing portion 51 and the annular member 71, respectively. It is configured in the same manner as the pump 10 except that a is provided.

The wire 102 is spirally wound around the outer peripheral surface 12 a of the inner element 12 . The lower side of the wire 102 is supported by projections formed on the outer peripheral surfaces of the coil housing portion 51 and the annular member 71 .
The outer peripheral surface 12 a of the inner element 12 is composed of the outer peripheral surfaces 31 a of the plurality of rotating units 31 and the outer peripheral surfaces 32 a of the plurality of diffuser units 32 .

A wire 102 integrates a plurality of rotating units 31 and a plurality of diffuser units 32 . That is, the wire 102 has the same function as the production pipe 11 described above.
As the wire 102, for example, a metal wire can be used.

A lower end 12 b of the inner element 12 is in contact with the upper surface 7 a of the support portion 7 . The lower end 12b of the inner element 12 is composed of the lower surface 51a of the coil accommodating portion 51 and the lower surface 55a of the magnet accommodating portion 55 which constitute the rotating unit 31 arranged in the lowest layer among the plurality of rotating units 31 .

According to the pump 100 of the third embodiment, by providing the wire 102 that integrates the plurality of rotating units 31 and the plurality of diffuser units 32, there is no need to prepare a long production pipe. can improve the transportability of

The pump 100 configured as described above can obtain the same effects as the pump 10 of the first embodiment.

Also, instead of the rotor blades 44 constituting the pump 100 of the third embodiment, the rotor blades 95 described in the second embodiment may be used.
Furthermore, the wire 102 described in the third embodiment may be used instead of the production pipe 11 that constitutes the pump 85 of the second embodiment. In this case, effects similar to those of the third embodiment 100 can be obtained.
In addition, in the third embodiment, as an example, the wire 102 is arranged in a spiral shape, but the wire 102 integrates the plurality of rotating units 31 and the plurality of diffuser units 32. As long as it is possible, the wire 102 may be arranged in a winding manner other than spiral.

(Fourth embodiment)
A pump 110 according to a fourth embodiment will be described with reference to FIGS. 9 and 10. FIG. Also shown in FIG. 9 is a drill pipe 5 that is not a component of the pump 110 . In FIG. 9, the same components as those of the structure shown in FIG. 2 are denoted by the same reference numerals.
In FIG. 10, the same components as those of the structure shown in FIG. 9 are denoted by the same reference numerals. 10, M1 is the thickness of the second seal member 114 in the Z direction (hereinafter referred to as "thickness M1"), and M2 is the thickness of the second seal member 114 disposed between the rotating unit 31 and the diffuser unit 32. The thickness of the intermediate portion of the seal member 114 (hereinafter referred to as "thickness M2") is shown.

The pump 110 has the same configuration as the pump 10 except that it has an inner element 111 instead of the inner element 12 that constitutes the pump 10 of the first embodiment.

The inner element 111 has a production pipe 113 and a second seal member 114 instead of the production pipe 11 and the second seal member 27 that constitute the inner element 12 described in the first embodiment. It is constructed in the same manner as the element 12 .

The production pipe 113 has the same configuration as the production pipe described in the first embodiment, except that it has flexibility. The production pipe 113 is a pipe capable of following the tilt of the drill pipe 5 when the drill pipe 5 tilts slightly. As the material of the production pipe 113, for example, it is possible to use a combination of a metal material such as steel or steel wire and a resin material such as nylon, polyester, or polyethylene.

The second seal member 114 has the same configuration as the second seal member 27 except that the thickness in the Z direction is thicker than that of the second seal member 27 described in the first embodiment. Therefore, the second seal member 114 is made of an elastic material (eg, rubber).

The second seal member 114 has an upper portion accommodated in the second recess 51D and a lower portion accommodated in the fourth recess 71B.
The thickness M1 of the second seal member 114 is large enough to form a gap 111A between the lower surface 51a of the coil accommodating portion 51 and the lower surface 55a of the magnet accommodating portion 55 and the upper surface 71b of the annular member 71. It is

The intermediate portion of the second seal member 114 is arranged between the lower surface 51 a of the coil accommodating portion 51 and the lower surface 55 a of the magnet accommodating portion 55 and the upper surface 71 b of the annular member 71 .
The size of the gap 111A in the Z direction is equal to the thickness M2 of the intermediate portion of the second seal member 114. As shown in FIG.
The gaps 111A are formed between the unit mechanisms 25 stacked in the Z direction.

According to the pump 110 of the fourth embodiment, the thickness M1 forms a gap 111A between the flexible production pipe 113 and the unit mechanisms 25 stacked in the Z direction, and is made of an elastic material. By having the configured ring-shaped second seal member 114 , it is possible to allow the intermediate portion of the second seal member 114 disposed between the unit mechanisms 25 to function as a joint.
As a result, when the outer shape of the production pipe 113 is deformed, the outer shape of the inner element 111 can follow the shape of the deformed production pipe 113 .

The pump 110 configured as described above can obtain the same effect as the pump 10 of the first embodiment.
Also, instead of the rotor blades 44 constituting the pump 110 of the fourth embodiment, the rotor blades 95 described in the second embodiment may be used.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the invention described in the scope of the claims. Transformation and change are possible.

DESCRIPTION OF SYMBOLS 1... Underground 2... Above ground 5... Excavation pipe 6, 21... Cylindrical part 6a, 21a, 51b, 55c, 71c... Inner peripheral surface 7, 22... Support part 7a, 22a, 51c, 55d, 71b... Upper surface 7A... Liquid Introduction hole 10, 85, 100, 110 Pump 11, 113 Production tube 12, 86, 111 Inner element 12a, 31a, 32a, 55b Outer peripheral surface 13 Control part 25, 91 Unit mechanism 27, 114 Third 2 seal members 31, 92... Rotating unit 32... Diffuser unit 34... Bolt 34A... Head 34B... Shaft 36... First seal member 41... Electric motor 42... Radial bearing 44, 95... Rotary blade 46... Fixed part 47... Rotating part 48... Space 51... Coil accommodating part 51a, 55a, 71a... Lower surface 51A, 55A... Accommodating space 51B... First concave part 51C... First bolt hole 51D... Second concave part 52... Coil 55... Magnet Accommodating portion 56 Permanent magnet 59 First through hole 61 Wing body 61A Tip surface 63 First channel 65, 82 Channel 71 Annular member 71A Third recess 71B Fourth Recess 71C Fifth recess 71D Second bolt hole 73 Diffuser vane 76 Second through hole 79 Second flow path 96 Inward screw 102 Wire 111A Gap A to E Area Cd Circumferential direction M1, M2... Thickness _O1 , _O2 ... Central axis _R1 ... Forward direction _R2 ... Reverse direction

Claims (12)

an inner element having a configuration in which a plurality of rotating units and diffuser units are alternately stacked in a vertical direction from underground to above ground, and for pumping liquid from the underground to above ground;
a production pipe having a tubular portion that extends in the vertical direction and accommodates the inner element therein, and a support portion that protrudes radially inward from a lower end of the tubular portion and supports the lower end of the inner element;
with
The rotating unit includes a fixed portion having an annular shape and whose position is restricted by the inner peripheral surface of the production pipe, a rotating portion having an annular shape disposed inside the fixed portion, and the fixed portion. and a radial bearing provided between an inner peripheral surface of the rotating portion and an outer peripheral surface of the rotating portion; a radial bearing provided on the inner peripheral surface of the rotating portion; a rotor that rotates with
The diffuser unit has an annular shape, and its position is regulated by the inner peripheral surface of the production pipe, and the annular member is arranged on the upper surface of the fixing portion positioned directly below; and the inner peripheral surface of the annular member. and a plurality of diffuser vanes that are provided on the inner peripheral surface of the annular member and protrude radially inward from the inner peripheral surface of the annular member. an inner element having a configuration in which a plurality of rotating units and diffuser units are alternately stacked in a vertical direction from underground to above ground, and for pumping liquid from the underground to above ground;
a wire wound around the outer peripheral surface of the inner element to integrate the plurality of rotating units and the plurality of diffuser units;
with
The rotating unit includes a ring-shaped fixing portion that contacts the wire, a ring-shaped rotating portion disposed inside the fixing portion, an inner peripheral surface of the fixing portion, and the rotating portion. and a radial bearing provided between the outer peripheral surface of the rotating part, and a rotating blade provided on the inner peripheral surface of the rotating part, protruding radially inward from the inner peripheral surface of the rotating part, and rotating together with the rotating part. have
The diffuser unit has an annular shape that is in contact with the wire, and has an annular member disposed on the upper surface of the fixing portion positioned directly below, and an annular member provided on the inner peripheral surface of the annular member. a plurality of diffuser vanes projecting radially inward from the inner peripheral surface. A first flow path extending in the vertical direction is formed in the center of the rotating unit,
At the center of the diffuser unit, a second flow path is formed inside the plurality of diffuser vanes, extends in the vertical direction, and faces the first flow path in the vertical direction. 3. Pump according to claim 1 or 2. A first through hole defined by the inner peripheral surface of the rotating part, extending in the vertical direction, and accommodating the rotating blade is formed in the center of the rotating part,
At the center of the annular member, a first diffuser vane is partitioned by the inner peripheral surface of the annular member, extends in the vertical direction, accommodates the plurality of diffuser vanes, and has a diameter equal to the diameter of the first through hole. 2 through holes are formed,
4. Any one of claims 1 to 3, wherein the rotating unit and the diffuser unit are stacked such that the central axis of the first through hole and the central axis of the second through hole are aligned. Pump as described. 5. The pump according to any one of claims 1 to 4, further comprising a bolt that penetrates the annular member in the vertical direction and fixes the annular member to the fixing portion. The inner element includes a configuration in which unit mechanisms each having one of the rotating units and the diffuser unit fixed by the bolts and the bolts are stacked in the vertical direction,
6. The pump according to claim 5, wherein the unit mechanism has a ring-shaped first seal member arranged outside the bolt between the annular member and the fixed portion. 7. The pump according to claim 6, wherein said inner element has a ring-shaped second sealing member disposed between said vertically stacked unit mechanisms. a bolt passing through the annular member in the vertical direction and fixing the annular member to the fixing portion;
The inner element includes a configuration in which unit mechanisms each having one of the rotating units and the diffuser unit fixed by the bolts and the bolts are stacked in the vertical direction,
The inner element has a ring-shaped second sealing member disposed between the vertically stacked unit mechanisms,
The production pipe has flexibility,
2. The pump according to claim 1, wherein said second sealing member is made of an elastic material and has a thickness capable of forming a gap between said unit mechanisms stacked vertically. The rotor blades are provided at intervals in the circumferential direction of the inner peripheral surface of the rotating portion, and are composed of a plurality of blade bodies arranged outside the first flow path,
4. The pump according to claim 3, wherein said plurality of blades extend in said vertical direction and are streamlined. 4. A pump according to claim 3, wherein said rotor is an inward screw with said first flow path formed in its center. 11. The pump according to any one of claims 1 to 10, further comprising a control section that rotates the rotor blades forward or backward by controlling an electric motor including the fixed section and the rotating section. The fixed part has a coil and a coil housing part that houses the coil,
12. The pump according to any one of claims 1 to 11, wherein the rotating portion has a permanent magnet and a magnet accommodation portion that accommodates the permanent magnet.

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