JP3984485B2 - Magnetic pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a magnet pump suitable for feeding a fluid such as a corrosive fluid.
[Prior art]
[0002]
Conventionally, a magnet type pump has been used for the purpose of feeding a corrosive fluid or the like. FIG. 2 is a partially broken front view showing an example of a conventional magnet pump, and this magnet pump is a centrifugal centrifugal pump. As shown in FIG. 2, the magnet type centrifugal pump 31 includes a pump main body 100 having a driving rotary body 16 having a driving magnet 14 and a driven rotary body 17 having a driven magnet 13, and the driving rotary body 16. The shaft 3 is connected to the front end thereof, the cooling fan 32 is connected to the rear end of the shaft 3, the fan cover 33 covering the fan 32, and the electric motor 102 having the electric motor casing 9. The fan cover 33 is provided with a slit 34 for ventilation.
[0003]
The driving magnet 14 and the driven magnet 13 are divided by a front casing 10 and a housing 12 provided via a casing gasket 21 and are arranged to face each other. The drive rotor 16 is covered with a rear casing 11. A bearing 22 is provided between the main shaft 15 supported at both ends by the front casing 10 and the housing 12 and the driven rotor 17. A front thrust ring 24 and a mouth ring 25 are provided on the front surface side of the driven rotor 17, and a rear thrust ring 23 that slides on the rear end portion of the bearing 22 is provided on the main shaft support portion of the housing 12. The shaft 3 and the drive rotating body 16 are integrally rotated about the rotating shaft 8, and the driven rotating body 17 and the cooling fan 32 are integrally rotated about the rotating shaft 8.
[0004]
When the drive rotator 16 rotates with the rotation of the shaft 3, the driven rotator 17 having the driven magnet 13 coupled with the drive magnet 14 by magnetic force rotates around the main shaft 15. As a result, the fluid is sucked from the suction port 18 into the pump chamber partitioned by the front casing 10 and the housing 12, and discharged from the discharge port 20 through the fluid passage 19 of the driven rotor 17.
[0005]
Before using the magnet pump as described above, it is necessary to confirm the following items in advance. Even when the pump is in use, the following confirmation is required when an abnormality occurs in the pump.
(1) Is there a foreign object in the pump 31?
(2) Check for damage inside the pump 31.
(3) Check whether the relative position of the driving magnet 14 and the driven magnet 13 is deviated (is the coupling state by magnetic force)?
Further, in the magnet type centrifugal pump 31 as shown in FIG. 2, the following confirmation (4) is further required.
(4) Whether the pump chamber is filled with fluid (no air reservoir).
[0006]
That is, when operating in the state as described in (1) above, abnormal noise may occur or vibration may occur, and the inside of the pump 31 may eventually be damaged. In order to check whether or not there is a foreign object in the pump 31, it can be determined by manually rotating the shaft 3 and whether the shaft 3 rotates smoothly. Also in the case of (2) above, it can be confirmed in the same manner as (1).
[0007]
When operating in the state as in (3) above, even if the drive rotator 16 rotates, the driven rotator 17 does not rotate along with it, so that no fluid is discharged. In such a case, the shaft 3 is manually rotated to adjust the deviation between the driving magnet 14 and the driven magnet 13.
[0008]
When there is an air pool as in (4) above, a sufficient discharge amount may not be obtained, or the fluid may not be discharged at all. In addition, if there is a large amount of air accumulation, there is a risk of burning inside. In such a case, the air reservoir is removed from the discharge port 20 or the like by replenishing the fluid in the pump chamber or manually rotating the shaft 3 several times.
[0009]
Therefore, in order to confirm or eliminate the abnormalities shown in the above (1) to (4), it is necessary to rotate the shaft 3 manually. In order to manually rotate the shaft 3, the fan cover 33 is usually removed and the cooling fan 32 attached to the shaft 3 is rotated manually. However, removing and attaching the fan cover 33 every time an abnormality is confirmed is very laborious and cumbersome. Further, since the cooling fan 32 is directly touched by hand, there is a concern about a safety problem. On the other hand, removing the fan cover 33 or making it easy to attach or detach is also problematic in terms of safety.
[0010]
[Problems to be solved by the invention]
An object of the present invention is to provide a magnet-type pump capable of confirming or eliminating a pump abnormality safely and easily.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, a magnet type pump of the present invention comprises a pump main body having a drive rotator provided with a drive magnet and a driven rotator provided with a follower magnet, and a tip connected to the drive rotator. A shaft, a cooling fan connected to the rear end of the shaft, and a fan cover that covers the cooling fan, and an electric motor for rotating the drive rotating body, and at the rear end of the shaft, A handle engaging portion capable of engaging with a handle for manually rotating the shaft is provided, and the fan cover is provided with an insertion port for inserting the handle at a rear position of the shaft. Features.
[0012]
As described above, the magnet type pump according to the present invention includes the handle engaging portion at the rear end portion of the shaft, and the insertion port for inserting the handle into the fan cover is provided at the rear position of the shaft . Therefore, the shaft can be rotated by inserting the handle from the insertion port and engaging the handle engaging portion with the fan cover attached, and rotating the handle. This eliminates the need to remove and install the fan cover every time an abnormality is detected in the pump, and eliminates the need to touch the fan directly to rotate the shaft. Can be confirmed or resolved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially broken front view showing a magnet type centrifugal pump which is an embodiment of the present invention. In FIG. 1, the same members as those in FIG.
[0014]
As shown in FIG. 1, the magnet type centrifugal centrifugal pump 1 according to this embodiment has a hexagon socket head bolt 6 attached to a rear end surface of a shaft 3 via a cooling fan 4, and the head of the hexagon socket head bolt 6. The shaft 3 can be manually rotated by engaging a hexagon wrench 2 (handle) with a hexagonal hole (handle engaging portion) provided in the portion. An insertion port 7 for inserting the bar wrench 2 is provided.
[0015]
In order to attach the hexagon socket head bolt 6 to the rear end surface of the shaft 3, for example, a screw hole (not shown) to be screwed with the bolt 6 is formed in the rear end surface of the shaft 3 and the bolt inserted in the cooling fan 4 is inserted. The bolt 6 is screwed into the screw hole through the hole.
[0016]
The effective screw depth of the hexagon socket head bolt 6 (the length of the male screw portion screwed into the screw hole) may be at least 10 mm. Further, the size of the hexagon socket head cap screw 6 is not particularly limited, and may be determined according to the torque necessary for manually rotating the shaft. Specifically, for example, when the motor output is less than 11 kW, a hexagon socket head cap screw of about M5 to M8 described in JIS B 1176, as described in so-called “Nominal Thread” is about 11 to 22 kW. It is preferable to use hexagon socket head cap screws of about M6 to M12. Even if the motor output exceeds 22 kW, an appropriate hexagon socket head bolt 6 may be determined according to the required torque.
[0017]
The screwing direction of the hexagon socket head bolt 6 to the screw hole may be either rightward or leftward, but preferably the screwing direction (tightening direction) of the hexagon socket head bolt 6 and the shaft by the hexagon stick wrench 2. 3 manual rotation direction is preferably the same direction. When the screwing direction of the hexagon socket head bolt 6 and the manual rotation direction of the shaft 3 are opposite, it is preferable to take measures to prevent the hexagon socket head bolt 6 from loosening and falling off. For example, the hexagon socket head bolt 6 and the shaft 3 may be joined by welding or an adhesive.
[0018]
As the hexagon stick wrench 2, in addition to the L shape as shown in FIG. 1, for example, a T shape (not shown) or the like can be used.
[0019]
The opening position of the insertion port 7 provided in the fan cover 5 is substantially the center of the fan cover 5, that is, the rear position of the shaft 3. Further, the diameter of the insertion port 7 may be a size that does not hinder the insertion of the hexagon wrench 2 to be used, but if it becomes too large, there is a risk that a finger will be accidentally inserted. Is usually about 6 to 15 mm.
[0020]
In this embodiment, in order to confirm abnormality in the pump main body 100, the hexagon stick wrench 2 is inserted from the insertion port 7, and is engaged with the hexagon hole provided in the head of the hexagon socket head bolt 6. In this state, when the hexagon wrench 2 is rotated (for example, rotated in the tightening direction of the bolt 6), the shaft 3 can be rotated in the same direction. Thereby, it is not necessary to remove and attach the fan cover 5 every time the abnormality of the pump is confirmed, and the abnormality in the pump chamber can be confirmed or eliminated safely and easily.
[0021]
In the above embodiment, the case where the handle engaging portion is a hexagonal hole of the hexagon socket head bolt 6 has been described. However, the handle engaging portion is not limited to such an engaging hole such as a hexagonal hole. 3 may be an engaging protrusion that protrudes in the axial direction from the rear end surface. In this case, the handle to be used can be a rod-shaped member having a recess at the tip that engages with the protrusion.
[0022]
In the above embodiment, the case where the hexagon socket head bolt 6 is screwed to the shaft 3 via the cooling fan 4 has been described. However, depending on the mounting structure of the cooling fan 4, the rear end surface of the shaft 3 may be a fan. It may be exposed on the cover 5 side. In such a case, the hexagon socket head bolt 6 is directly screwed onto the rear end surface of the shaft 3 to attach the hexagon socket head bolt 6.
[0023]
Furthermore, in the above-described embodiment, a magnetic spiral centrifugal pump has been described as an example of a magnet pump, but the present invention can be similarly applied to other magnet pumps such as a magnet vane pump.
[0024]
【The invention's effect】
According to the present invention, there is an effect that a pump abnormality can be confirmed or eliminated safely and easily.
[Brief description of the drawings]
FIG. 1 is a partially broken front view showing a magnet type centrifugal pump which is an embodiment of the present invention.
FIG. 2 is a partially broken front view showing an example of a conventional magnet type centrifugal centrifugal pump.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Magnet type centrifugal centrifugal pump, 2 ... Hexagon stick wrench (handle), 3 ... Shaft, 4 ... Cooling fan, 5 ... Fan cover, 6 ... Hex socket head bolt, 7 ... Tool insertion hole, 8 ... Rotating shaft, DESCRIPTION OF SYMBOLS 9 ... Casing, 10 ... Front casing, 11 ... Rear casing, 12 ... Housing, 13 ... Driven magnet, 14 ... Drive magnet, 15 ... Main shaft, 16 ... Drive rotary body, 17 ... Driven rotary body, 18 ... Suction port , 19 ... Fluid passage, 20 ... Discharge port, 21 ... Casing gasket, 22 ... Bearing, 23 ... Rear thrust ring, 24 ... Front thrust ring, 25 ... Mouth ring, 100 ... Pump body, 101 ... Electric motor

Claims (2)

A pump body having a drive rotator with a drive magnet and a driven rotator with a follower magnet;
A shaft having a tip connected to the drive rotator, a cooling fan connected to the rear end of the shaft, and a fan cover covering the cooling fan, and an electric motor for rotating the drive rotator ,
A handle engagement portion that can engage with a handle for manually rotating the shaft is provided at the rear end of the shaft,
A magnet type centrifugal centrifugal pump characterized in that the fan cover is provided with an insertion port for inserting the handle at a rear position of the shaft. The magnet type centrifugal centrifugal pump according to claim 1, wherein the handle engaging portion is a hexagon socket of a hexagon socket head bolt provided at a rear end portion of the shaft, and the handle is a hexagon stick wrench.

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