JP3227646U - Cand motor pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a canned motor pump in which a fixing screw is not loosened by vibration generated during operation of a motor while using a plastic material.
SOLUTION: A canned motor pump has a holding base 10 formed of a plastic material in a hollow tubular body so as to have a front opening and a rear opening, and a front cover 50 attached to the holding base so as to cover the front opening. A back cover 70 attached to the holding base so as to cover the rear opening, a front nut 13 and a back nut 14 made of a metal material and arranged in the holding base, and a front cover made of a metal material and penetrating the front cover. It is provided with a first fixing screw 60 which is screwed with the front nut and a second fixing screw 80 which is made of a metal material and penetrates the back cover and is screwed with the back nut.
[Selection diagram] Fig. 2

Description

The present invention relates to a canned motor pump.

Examples of the conventional canned motor pump used for supplying a liquid include those described in Patent Document 1. As described in Patent Document 1, the conventional canned motor pump includes a canned motor, an impeller that is rotationally driven by the canned motor, and a front cover and a back cover that cover both front and rear sides of the canned motor. It is configured. The front cover and back cover are fixed to the front and rear flanges formed on the side cover of the canned motor with screws, respectively. However, when a metal material is used for the side cover of the canned motor, the liquid to be supplied is a corrosive substance. If there is, it may be corroded and cause malfunctions, while when using a plastic material as the side cover of the canned motor, the fixing effect by the screw is weak and it may be loosened by the vibration generated during the operation of the motor. Yes, and if the screws are loosened, corrosive substances can enter through the gap between the front or back cover and the side cover of the canned motor and destroy the motor body.

Taiwan Patent No. I441984

In view of the above problems, it is an object of the present invention to provide a canned motor pump that uses a plastic material but does not have a possibility that the fixing screw is loosened by vibration generated during the operation of the motor.

In order to achieve the above object, the present invention is formed in a hollow tubular body having a motor, an impeller that is rotationally driven by the motor, and a front opening and a rear opening, and the motor is housed in a pipe. A holding base, a front cover attached to the holding base so as to cover the impeller and the front opening of the holding base, and a back cover attached to the holding base so as to cover the rear opening of the holding base. A canned motor pump equipped with,
The holding base is made of a plastic material and
A front nut made of a metal material and a back nut made of a metal material are arranged in the holding table so as to correspond to the front cover and the back cover, respectively.
Further, a first fixing screw made of a metal material penetrates the front cover and is screwed with the front nut arranged in the holding base.
Provided is a canned motor pump characterized in that a second fixing screw made of a metal material penetrates the back cover and is screwed with the back nut arranged in the holding base.

As described above, the canned motor pump of the present invention is made of a metal material and holds as a first fixing screw for fixing the front cover and the back cover to the holding base and a nut for screwing with the second fixing screw. Since the front nut and back nut placed in the table are used, the holding table is formed by the plastic material while having sufficient bonding strength by screwing the screws and nuts between the metal materials. The housed motor can be protected from corrosive substances.

It is a perspective view which shows the external structure of the canned motor pump of this invention. It is an exploded perspective view which shows the internal structure of the canned motor pump shown in FIG. It is a partially cutaway perspective view which shows the internal structure of the canned motor pump shown in FIG. It is a partially cutaway perspective view which shows the internal structure of the canned motor pump shown in FIG. It is a partial cross-sectional view which shows the internal structure of the canned motor pump shown in FIG.

Hereinafter, embodiments of the canned motor pump according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the external configuration of the canned motor pump of the present invention, FIG. 2 is an exploded perspective view showing the internal configuration of the canned motor pump shown in FIG. 1, and FIG. 3 is shown in FIG. FIG. 4 is a partially cutaway perspective view showing the internal configuration of the canned motor pump, FIG. 4 is a partially cutaway perspective view showing the internal configuration of the canned motor pump shown in FIG. 1, and FIG. 5 is shown in FIG. It is a partial cross-sectional view which shows the internal structure of the canned motor pump.

As shown in FIGS. 1 and 2, the canned motor pump of the present invention includes a motor 30, an impeller 40 rotationally driven by the motor 30, a holding base 10 for accommodating the motor 30, and a holding base 10. A front cover 50 and a back cover 70 that cover the front and rear openings, a plurality of first fixing screws 60 for fixing the front cover 50 to the holding base 10, and a plurality of for fixing the back cover 70 to the holding base 10. The second fixing screw 80 of the above is provided.

As shown in FIGS. 2 and 3, the holding table 10 is formed of a plastic material into a hollow tubular body surrounding a predetermined axis L so as to have a front opening 101 and a rear opening 102, and is a motor. 30 is housed in the jurisdiction.

As the plastic material forming the holding table 10, for example, polypropylene (PP), glass fiber reinforced polypropylene (GFRPP), polyvinylidene fluoride (PVDF), carbon fiber reinforced ETFE resin (CFRETFE), and other plastic materials resistant to corrosive substances are used. Can be used.

More specifically, in this embodiment, the holding table 10 is larger than the annular first ring portion 11 surrounding the front opening 101 and the outer peripheral edge of the first ring portion 11 than the first ring portion 11. An annular second ring portion 12 formed in diameter and surrounding the rear opening 102, and a tubular extending portion 121 extending from the second ring portion 12 to the side facing the rear opening 102. Made of plastic material.

A plurality of front nuts 13 made of a metal material are arranged in the first ring portion 11 of the holding base 10, and a plurality of back nuts 14 made of a metal material are arranged in the second ring portion 12. Has been done. As a method of arranging each front nut 13 and each back nut 14 made of a metal material inside the holding base 10, each front nut 13 and each back nut 14 made of a metal material in advance before casting the holding base 10 By arranging each back nut 14 at an appropriate place in the mold (in this embodiment, the back nut 14 is arranged so as to be spaced apart from each other around the axis L), when the holding base 10 is cast-molded, each front nut 14 is formed. A method of embedding the 13 and each back nut 14 inside the holding base 10 can be mentioned.

The number of front nuts 13 is the same as that of the first fixing screw 60, and those having a size capable of being screwed with one first fixing screw 60 are used. Similarly, the number of back nuts 14 is the same as that of the second fixing screw 80, and those having a size that can be screwed with one second fixing screw 80 are used. By the way, the dimensions of the first fixing screw 60 and the dimensions of the second fixing screw 80 do not necessarily have to be the same, and those having appropriate dimensions can be used if necessary. In the embodiment, the first fixing screw 60 and the second fixing screw 80 have substantially the same dimensions.

Each front nut 13 is formed in a hollow tubular shape so as to surround a first nut hole 133 that receives a corresponding first fixing screw 60, and each of the two opening ends has a first fixing screw 60. The first flange 131 having a non-circular cross section orthogonal to the insertion direction is formed so as to project. That is, the front nut 13 is a hollow circular tubular body and has a first nut body 132 that surrounds the first nut hole 133, and at both ends of the first nut body 132, the extension direction of the first nut body 132 is defined. The first flange 131 having a non-circular (hexagonal) cross section at right angles is formed so as to project.

Each back nut 14 is formed in a hollow tubular shape so as to surround a second nut hole 143 that receives a corresponding second fixing screw 80, and each of the two opening ends has a second fixing screw 80. A second flange 141 having a non-circular cross section orthogonal to the insertion direction is formed so as to project. That is, the back nut 14 has a second nut body 142 which is a hollow circular tubular shape and surrounds the second nut hole 143, and both ends of the second nut body 142 have a extending direction of the second nut body 142. A second flange 141 having a non-circular (hexagonal) cross section at right angles is formed so as to project.

The first fixing screw 60 or the second fixing screw is formed by forming the first flange 131 and the second flange 141 overhanging from each front nut 13 and each back nut 14 in a non-circular (hexagonal) cross section. Since it is possible to prevent relative movement and rotation with respect to the holding base 10 when screwing with the 80, it contributes to more reliable screwing and fixes the front cover 50 and the back cover 70 so as to be in close contact with the holding base 10. can do.

Further, in this embodiment, the first ring portion 11 of the holding base 10 is opened toward the front cover 50 and is corresponded to communicate with the first nut hole 133 of the front nut 13. The fixing hole 113 is formed. That is, in this embodiment, since the front nut 13 is arranged at the back of the first ring portion 11, the first fixing hole 60 as a passage for screwing the first fixing screw 60 with the front nut 13 is provided. 113 is formed. Therefore, each first fixing screw 60 is screwed into the corresponding front nut 13 after inserting the corresponding first fixing hole 113.

Similarly, in this embodiment, the second ring portion 12 of the holding base 10 is opened toward the back cover 70 and corresponds to communicate with the second nut hole 143 of the back nut 14. The fixing hole 114 of the above is formed. That is, in this embodiment, since the back nut 14 is arranged at the back of the second ring portion 12, the second fixing hole 80 serves as a passage for screwing the second fixing screw 80 with the back nut 14. 114 is formed. Therefore, each second fixing screw 80 is screwed into the corresponding back nut 14 after inserting the corresponding second fixing hole 114.

Of course, when the opening for receiving the first fixing screw 60 of the front nut 13 is exposed on the surface of the holding base 10, it is not necessary to form the first fixing hole 113 as a passage. The installation location of the front nut 13 can be appropriately determined when designing the shape and dimensions of the holding base 10, and the same applies to the back nut 14.

In this embodiment, the holding base 10 is arranged so as to be sandwiched between the holding base 10 and the back cover 70 on the rear opening 102 side, and also has a fixed frame 20 to which the motor 30 is fixed.

The fixing frame 20 is made of a metal material, can receive the second fixing screw 80, and has a corresponding through hole 21 formed so as to communicate with the second nut hole 143 of the back nut 14. ing.

The second fixing screw 80 is inserted into the second nut hole 143 of the back nut 14 after the passing hole 21 and the second fixing hole 114 are inserted in order, and is screwed with the back nut 14. It is configured.

A canned motor is used as the motor 30, and the motor 30 is fixed to the fixed frame 20 so as to be housed in the pipe of the holding base 10.

The impeller 40 is rotationally driven by the motor 30, and is covered with a front cover 50 on the front opening 101 side of the holding base 10. Incidentally, in this embodiment, the impeller 40 that is rotationally driven by the motor 30 is arranged and configured to rotate about a rotation axis that coincides with the axis L.

The front cover 50 is formed with a first screw passage hole 51 that is inserted by each of the first fixing screws 60. Each of the first screw passage holes 51 is formed at a corresponding position so as to communicate with one first fixing hole 113.

The back cover 70 is formed with a second screw passage hole 71 that is inserted by each of the second fixing screws 80. Each of the second screw passage holes 71 is formed at a corresponding position so as to communicate with one second fixing hole 114.

Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and includes all modifications and equal configurations as various configurations included within the spirit and scope of the broadest interpretation. It shall be.

The canned motor pump of the present invention is made of a metal material and placed in the holding base as a nut for screwing the front cover and the back cover to the holding base as a first fixing screw and a second fixing screw. Since the front nut and back nut are used, the motor housed in the pipe can be accommodated in order to form a holding base with the plastic material while having sufficient bonding strength by screwing the screws and nuts between the metal materials. It can be protected from corrosive substances.

Further, by forming the cross section of each front nut and the first flange and the second flange protruding from each back nut into a non-circular shape (hexagon), it is screwed with the first fixing screw or the second fixing screw. Since it is possible to prevent relative movement and rotation with respect to the holding table, it contributes to more reliable screwing, and the front cover and the back cover 70 are fixed so as to be in close contact with the holding table.
The invasion of corrosive substances can be prevented more reliably.

10 Holding stand 101 Front opening 102 Rear opening 11 First ring part 113 First fixing hole 114 Second fixing hole 12 Second ring part 121 Extension part 13 Front nut 131 First flange 132 First nut body 133 First nut hole 14 Back nut 141 Second flange 142 Second nut body 143 Second nut hole 20 Fixed frame 21 Pass hole 30 Motor 40 Impeller 50 Front cover 51 First screw pass hole 60 First Fixing screw 70 Back cover 71 Second screw passing hole 80 Second fixing screw L axis

Claims (4)

A motor, an impeller that is rotationally driven by the motor, a holding base that is formed in a hollow tubular body so as to have a front opening and a rear opening, and that houses the motor in a pipe, the impeller, and the impeller. A canned motor pump including a front cover attached to the holding base so as to cover the front opening of the holding base, and a back cover attached to the holding base so as to cover the rear opening of the holding base. ,
The holding base is made of a plastic material and
A front nut made of a metal material and a back nut made of a metal material are arranged in the holding table so as to correspond to the front cover and the back cover, respectively.
Further, a first fixing screw made of a metal material penetrates the front cover and is screwed with the front nut arranged in the holding base.
A canned motor pump characterized in that a second fixing screw made of a metal material penetrates the back cover and is screwed with the back nut arranged in the holding base. Further having a fixed frame arranged so as to be sandwiched between the holding table and the back cover on the rear opening side of the holding table.
The fixing frame is made of a metal material, and a passing hole corresponding to the second fixing screw and the back nut is formed. The second fixing screw is inserted into the passing hole and then becomes the back nut. The canned motor pump according to claim 1, wherein the canned motor pump is configured to be screwed. The holding base has a first fixing hole that opens toward the front cover and corresponds to the front nut.
It is formed so as to open toward the back cover and have a second fixing hole corresponding to the back nut.
The first fixing screw is screwed into the front nut after inserting the first fixing hole.
The canned motor pump according to claim 1, wherein the second fixing screw is configured to be screwed into the back nut after inserting the second fixing hole. The front nut is formed in a hollow tubular shape so as to surround the first nut hole for receiving the first fixing screw, and the direction in which the first fixing screw is inserted into each of the two openings. The first flange, which has a non-circular cross section orthogonal to the above, is formed so as to overhang.
The back nut is formed in a hollow tubular shape so as to surround the second nut hole for receiving the second fixing screw, and the direction in which the second fixing screw is inserted into each of the two openings. The canned motor pump according to claim 1, wherein a second flange having a non-circular cross section orthogonal to the pump is formed so as to project.