JP2003254279A - Magnet type pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnet type pump that safely and easily detects or eliminates an anomaly in the pump. <P>SOLUTION: The magnet type volute centrifugal pump 1 comprises a pump body 100 having a driving rotor 16 with driving magnets 14 and a driven rotor 17 with driven magnets 13, and an electric motor 101 having a shaft 3 with a tip end connected to the driving rotor 16, a cooling fan 4 connected to a rear end of the shaft 3, and a fan cover 5 enclosing the cooling fan 4, in order to rotate the driving rotor 16. The rear end of the shaft 3 has a hexagon socket (handle engaging portion) of a hexagon socket head cap screw 6 capable of engaging with a hexagon bar wrench 2 (handle) with which the shaft 3 is rotated manually, and the fan cover 5 has an insertion opening 7 into which the hexagon bar wrench 2 is inserted. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet type pump suitable for feeding a fluid such as a corrosive fluid.

[Prior art]

Conventionally, a magnet type pump has been used for the purpose of sending a corrosive fluid or the like. FIG. 2 is a partially cutaway front view showing an example of a conventional magnet type pump, and this magnet type pump is a centrifugal centrifugal pump.
As shown in FIG. 2, a magnet type centrifugal centrifugal pump 31
Is a pump body 100 having a drive rotor 16 having a drive magnet 14 and a driven rotor 17 having a driven magnet 13, a shaft 3 having a tip connected to the drive rotor 16, and a shaft 3 of the shaft 3. Electric motor 102 having cooling fan 32 connected to the rear end, fan cover 33 covering fan 32, and electric motor casing 9.
It has and. The fan cover 33 is provided with a slit 34 for ventilation.

The drive magnet 14 and the driven magnet 13 are separated by a front casing 10 and a housing 12 which are provided with a casing gasket 21 therebetween, and are arranged to face each other. The drive rotor 16 is covered by a rear casing 11. A bearing 22 is provided between the driven rotor 17 and the main shaft 15 whose both ends are supported by the front casing 10 and the housing 12. A front thrust ring 24 and a mouth ring 25 are provided on the front surface side of the driven rotating body 17, and a rear thrust ring 23 that slides with the rear end portion of the bearing 22 is provided on the main shaft supporting portion of the housing 12. The shaft 3 and the driving rotary body 16 integrally rotate about the rotary shaft 8, and the driven rotary body 17 and the cooling fan 32 integrally rotate about the rotary shaft 8.

When the drive rotor 16 rotates as the shaft 3 rotates, the driven rotor 17 including the driven magnet 13 which is in a state of being magnetically coupled to the drive magnet 14 rotates around the main shaft 15. As a result, the fluid is sucked from the suction port 18 into the pump chamber defined by the front casing 10 and the housing 12, and is discharged from the discharge port 20 through the fluid passage 19 of the driven rotating body 17.

Before using the above magnet type pump, it is necessary to confirm the following items in advance. In addition, the following confirmation is required when the pump is abnormal even during use. (1) Check that there is no foreign matter caught inside the pump 31. (2) Is there any damage inside the pump 31? (3) Check whether the relative position between the driving magnet 14 and the driven magnet 13 is displaced (is it in a state of being coupled by magnetic force). Further, in the magnet type centrifugal centrifugal pump 31 as shown in FIG. 2, it is necessary to confirm the following (4). (4) Is the pump chamber filled with fluid (whether there is no air pocket)?

That is, when operating in the state as described in (1) above, abnormal noise may occur or vibration may occur.
Finally, the inside of the pump 31 may be damaged. In order to confirm whether or not foreign matter is caught in the pump 31, it is possible to manually rotate the shaft 3 and determine whether the shaft 3 rotates smoothly. Also, in the case of (2) above, it can be confirmed in the same manner as in (1).

When operated in the above condition (3), even if the drive rotor 16 rotates, the driven rotor 17 does not rotate accordingly, so that no fluid is discharged. In such a case, the shaft 3 is manually rotated to adjust the displacement between the drive magnet 14 and the driven magnet 13.

When there is an air pocket as described 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 pockets, there is a risk that seizure will occur inside. In such a case, air is removed from the discharge port 20 or the like by supplying fluid to the pump chamber or manually rotating the shaft 3 several times.

Therefore, in order to confirm or eliminate the above-mentioned abnormalities (1) to (4), the shaft 3 is used.
It is necessary to manually rotate. In order to rotate the shaft 3 manually, the fan cover 33 is usually removed and the cooling fan 3 attached to the shaft 3 is usually used.
Rotate 2 by hand. However, it is very time-consuming and complicated to remove and attach the fan cover 33 each time an abnormality is confirmed. Further, since the cooling fan 32 is directly touched by hand, there is a concern about safety. On the other hand, removing the fan cover 33 or making it easy to attach and detach it also poses a safety problem.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnet type pump which can safely and easily confirm or eliminate a pump abnormality.

[0011]

SUMMARY OF THE INVENTION A magnet type pump of the present invention for solving the above problems includes a pump body having a drive rotating body having a driving magnet and a driven rotating body having a driven magnet, and A shaft having a tip connected to the drive rotor, a cooling fan connected to the rear end of the shaft, and a fan cover for covering the cooling fan; and an electric motor for rotating the drive rotor, The rear end of the shaft is provided with a handle engaging portion that can be engaged with a handle for manually rotating the shaft, and the fan cover is provided with an insertion opening for inserting the handle. It is characterized by being

As described above, in the magnet type pump according to the present invention, the handle engaging portion is provided at the rear end of the shaft, and the fan cover is provided with the insertion opening for inserting the handle. The shaft can be rotated by inserting the handle from the insertion port with the cover attached and engaging the handle engaging portion, and rotating the handle. This eliminates the need to remove and install the fan cover each time the pump is checked for abnormalities, and since it is no longer necessary to directly touch the fan to rotate the shaft, it is safe and easy to detect abnormalities in the pump chamber. Can be confirmed or resolved.

[0013]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings. FIG. 1 is a partially cutaway front view showing a magnet type centrifugal centrifugal pump according to an embodiment of the present invention.
Note that, in FIG. 1, the same members as those in FIG. 2 described above are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 1, in a magnet type centrifugal centrifugal pump 1 according to this embodiment, a hexagon socket head cap screw 6 is attached to a rear end surface of a shaft 3 via a cooling fan 4, and the hexagon socket head cap screw is used. Hexagon wrench 2 (handle) in the hexagonal hole (handle engaging part) provided in the head of 6
The shaft 3 can be manually rotated by engaging with the fan cover 5. The fan cover 5 is provided with an insertion opening 7 for inserting the hexagonal wrench 2 during manual rotation.

To attach the hexagon socket head cap screw 6 to the rear end surface of the shaft 3, for example, a screw hole (not shown) which is screwed into the bolt 6 is formed in the rear end surface of the shaft 3 and provided on the cooling fan 4. The bolt 6 is screwed into the screw hole through the bolt insertion hole.

The effective screw depth of the hexagon socket head cap screw 6 (the length of the male screw part screwed into the screw hole) is at least 10 mm.
I wish I had it. The size of the hexagon socket head cap screw 6 is not particularly limited, and may be determined according to the torque required to manually rotate the shaft. Specifically, for example, when the motor output is less than 11 kW, JI
The so-called "nomenclature of screws" specified in SB 1176
The hexagon socket head cap screw of about M5 to M8 described in 11
In the case of about 22 kW, it is preferable to use hexagon socket head cap screws of about M6 to M12. Even when the electric motor output exceeds 22 kW, the appropriate hexagon socket head cap screw 6 may be determined according to the required torque.

The hexagon socket head cap screw 6 may be screwed into the screw hole either rightward or leftward, but preferably the hexagon socket head cap screw 6 is screwed in (tightening direction).
And the manual rotation direction of the shaft 3 by the hexagonal wrench 2 should be the same direction. When the screwing direction of the hexagon socket head cap screw 6 and the manual rotation direction of the shaft 3 are opposite to each other, it is preferable to take measures to prevent the hexagon socket head cap screw 6 from loosening and falling off. As a measure for preventing such a drop, for example, the hexagon socket head cap screw 6 and the shaft 3 may be joined by welding or by an adhesive.

As the hexagonal bar wrench 2, other than the L-shape as shown in FIG. 1, for example, a T-shape (not shown) or the like can be used.

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 shaft 3.
This is the rear position of. Further, the diameter of the insertion port 7 may be any size as long as it does not hinder the insertion of the hexagonal wrench 2 to be used, but if it is too large, there is a risk of accidentally inserting a finger. Is usually about 6 to 15 mm.

In this embodiment, the pump body 100
In order to confirm the abnormality inside, the hexagonal bar wrench 2 is inserted from the insertion port 7 and engaged with the hexagonal hole provided on the head of the hexagon socket head cap bolt 6. In this state, when the hexagonal 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. As a result, the fan cover 5
Since it is not necessary to remove and attach the pump, the abnormality in the pump chamber can be confirmed or eliminated safely and easily.

In the above embodiment, the case where the handle engaging portion is the hexagonal hole of the hexagon socket head cap bolt 6 has been described, but the handle engaging portion is not limited to such an hexagonal hole or the like. Alternatively, for example, it may be a protrusion for engagement provided in the axial direction from the rear end surface of the shaft 3. In this case, the handle to be used can be a bar-shaped member having a recess at the tip that engages with this protrusion.

In the above embodiment, the case where the hexagon socket head cap screw 6 is screwed onto the shaft 3 via the cooling fan 4 has been described. The end surface may be exposed to the fan cover 5 side. In this case, shaft 3
Hexagon socket head cap screw 6 is attached by directly screwing hexagon socket head cap screw 6 on the rear end face.

Further, in the above-described embodiment, the magnet type centrifugal centrifugal pump has been described as an example of the magnet type pump, but the present invention can be similarly applied to other magnet type pumps such as a magnet type vane pump. it can.

[0024]

According to the present invention, there is an effect that a pump abnormality can be confirmed or eliminated safely and easily.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a magnet type centrifugal centrifugal pump according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing an example of a conventional magnet type centrifugal centrifugal pump.

[Explanation of symbols]

1 ... Magnet type centrifugal centrifugal pump, 2 ... Hexagon wrench (handle), 3 ... Shaft, 4 ... Cooling fan, 5 ...
Fan cover, 6 ... Hexagon socket head cap bolt, 7 ... Tool insertion hole, 8 ... Rotating shaft, 9 ... Casing, 10 ... Front casing, 11 ... Rear casing, 12 ... Housing, 1
3 ... driven magnet, 14 ... drive magnet, 15
... spindle, 16 ... driving rotor, 17 ... driven rotor, 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 (3)

[Claims] 1. A pump body having a drive rotating body having a drive magnet and a driven rotating body having a driven magnet, a shaft having a tip connected to the drive rotating body, and a shaft connected to a rear end of the shaft. A cooling fan and a fan cover for covering the cooling fan, and an electric motor for rotating the drive rotating body. A handle for manually rotating the shaft is provided at a rear end portion of the shaft. A magnet pump, wherein a handle engaging portion that can be engaged is provided, and the fan cover is provided with an insertion opening for inserting the handle. 2. The magnet type pump according to claim 1, wherein the handle engaging portion is a hexagonal hole of a hexagonal socket bolt provided at a rear end portion of the shaft, and the handle is a hexagonal bar wrench. 3. The magnet type pump according to claim 1, which is a magnet type centrifugal centrifugal pump.