JP2009062821A - Magnet-driven constant capacity pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetically-driven constant capacity feeding pump capable of continuously feeding without causing variation in feed rate. <P>SOLUTION: The magnetically-driven constant capacity feeding pump 10 is equipped with a liquid sucking opening, a liquid discharging opening, a pump unit 1 equipped with a magnetically-driven unit 12, a driving magnet unit 2, a motor 3, a coupling means 4 which couples the driving magnet and the motor. The pump and the motor are electrically isolated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a magnet-driven constant capacity supply pump.

As a pump for supplying a liquid at a predetermined supply amount, a magnet-driven constant-capacity supply pump is known. For example, in Patent Document 1, a spinning solution is supplied to a nozzle using such a micropump. It is disclosed.
However, the method and apparatus for manufacturing a fiber assembly described in Patent Document 1 is a so-called electrostatic spinning method (discharging the spinning dope while discharging the spinning dope from the nozzle and applying an electric field to the discharged spinning dope. Therefore, a voltage is applied to the spinning dope and the spinning dope is charged. Therefore, since electricity flows to the motor that drives the micropump via the spinning dope and may cause malfunction of the motor, continuous production is difficult.

Therefore, as a method for insulating between the spinning dope and the driving device, a method using a syringe pump or a method using air pressure (for example, Patent Document 2) can be considered. However, the former method using a syringe pump is not suitable for continuous production. On the other hand, in the case of the latter method using air pressure, it is complicated to grasp the relationship between the pressure and the discharge amount in advance for all the spinning dope even if the internal pressure and thickness information are fed back. In addition, a time lag is inevitably generated, resulting in variation in weight per unit area.
Such a problem is considered to occur in the same manner even when the liquid is charged or easily charged.

JP 2006-112023 A JP 2007-92237 A

  Accordingly, an object of the present invention is to provide a magnet-driven constant-capacity supply pump that can be continuously supplied without causing variations in the supply amount.

  The object of the present invention is to provide a liquid suction port, a liquid discharge port, a pump unit having a driven magnet unit, a driving magnet unit, a motor, and a connecting means for connecting the driving magnet unit and the motor according to the present invention. This can be solved by the magnet-driven constant-capacity supply pump, wherein the pump unit and the motor are electrically insulated.

According to a preferred aspect of the pump of the present invention, the connecting means is made of an insulating material.
According to another preferable aspect of the pump of the present invention, the pump unit, the drive magnet unit, and / or the motor are provided with a support base that can be electrically insulated and fixed.

According to the pump of the present invention, since the drive magnet unit and the motor are electrically insulated, liquid can be continuously supplied without causing malfunction of the motor. Moreover, since it is a constant capacity supply type pump having a liquid suction port and a liquid discharge port, it is possible to continuously supply liquid without causing variations in the supply amount. Furthermore, since it is a magnet drive type, there is an effect that the liquid is not leaked and no electric shock is caused.
Further, according to the preferred embodiment of the present invention, since the pump base, the drive magnet section, and / or the motor is provided with a support base that can be electrically insulated and fixed, no short circuit to the peripheral device occurs, I don't get an electric shock.

  The pump of the present invention can have the same configuration as a conventional magnet-driven constant-capacity supply pump except that the drive magnet unit and the motor are electrically insulated. Examples of the magnet-driven constant capacity supply type pump include a gear pump and a Mono pump. Since these pumps can be supplied at a high flow rate, they are excellent in productivity, and the supply amount can be easily managed.

  FIG. 1 is a cross-sectional view schematically showing a typical embodiment of a gear pump which is an aspect of the pump of the present invention. In FIG. 1, except for the driven magnet portion 12 and the driving magnet portion 2, and the driving gear 13 and the driven gear 14, hatching indicating a cut surface is omitted and the internal structure of the motor is omitted. Further, the liquid suction port and the liquid discharge port are not shown in FIG. 1 because they can be arranged at desired positions of the pump unit 1 in accordance with the use form of the pump.

  A gear pump 10 shown in FIG. 1 includes a pump block 11 having an internal space 19, a drive magnet unit 2 provided outside the pump block 11, a motor 3 that drives the drive magnet unit 2, a drive magnet unit 2, and a motor. 3 and a shaft 4 connecting the three. The shaft 4 is made of an insulating material.

In the internal space 19 of the pump block 11, a driven magnet portion 12 is provided at a position facing the drive magnet portion 2, and a drive gear 13 that is driven by the rotation of the driven magnet portion 12 and a driven gear that meshes with the drive gear 13. A gear 14 is provided. Further, the pump block 11 includes a liquid suction port (not shown) that sucks liquid into the internal space 19 from the outside of the pump block 11, and a liquid discharge port that discharges liquid from the internal space 19 to the outside of the pump block 11. (Not shown) is provided at a predetermined position. The pump block 11 and the above-described members disposed in the internal space 19 function as the pump unit 1.
The drive magnet portion 2 and a part of the shaft 4 are accommodated in the case 5. In the pump of the present invention, the drive magnet portion and / or the shaft need not be housed in the case.

  In the gear pump 10 shown in FIG. 1, the rotation of the motor 3 is transmitted to the drive magnet unit 2 via the shaft 4, and the drive magnet unit 2 rotates outside the pump block 11. Due to the rotation of the drive magnet unit 2, the driven magnet unit 12 in the pump block 11 rotates, and at the same time, the drive gear 13 rotates. The driven gear 14 that meshes with the driving gear 13 rotates in accordance with the rotation of the driving gear 13. When the driving gear 13 and the driven gear 14 that are engaged with each other rotate, a liquid (for example, a spinning solution) flows into the internal space 19 from the liquid suction port, and further from the liquid discharge port to the outside of the pump block 11. Discharged.

  In the gear pump 10 shown in FIG. 1, since the shaft 4 is formed of an insulating material, even if the liquid is charged, the pump unit 1 and the motor 3 are electrically insulated from each other. The liquid can be continuously supplied without causing operation.

  As described above, the present invention has been described by taking the typical embodiment of the gear pump as one aspect of the pump of the present invention shown in FIG. 1 as an example. However, in the pump of the present invention, the pump unit and the motor are electrically insulated. As long as it is, the means is not particularly limited. In the present invention, as a connecting means for connecting the drive magnet unit and the motor, for example, a method of using a shaft that directly connects the two (see FIG. 1), a shaft directly extending from each of the two, a suitable transmitting means, For example, the method of connecting with a belt and / or a gear can be mentioned. In the present invention, by forming the connecting means from an insulating material, the pump unit and the motor can be electrically insulated.

As the insulating material forming the connecting means, a material having a volume resistance of 10 ¹⁰ Ω · cm or more is preferable. Examples of the insulating material include polyethylene, polypropylene, phenol resin, polyester resin, silicone resin, polystyrene, vinyl chloride resin, polytetrafluoroethylene, or perfluoroalkyl vinyl ether resin, silicone rubber, butyl rubber, nitrile rubber, Alternatively, rubber such as ethylene propylene rubber, or a material to which a filler is added can be used.

  Moreover, in this invention, the support stand which can electrically insulate and fix at least 1 of a pump part, a drive magnet part, and a motor can be provided. When the whole or at least a part of the support is formed of an insulating material, various insulating materials exemplified above with respect to the connecting means can be used.

  The present invention can be applied to, for example, the use of electrostatic spinning when it is necessary to continuously supply a charged liquid or a liquid that is easily charged.

It is sectional drawing which shows typically the typical embodiment of the gear pump which is one aspect | mode of the pump of this invention.

Explanation of symbols

1 ... pump part;
11 ... Pump block; 12 ... Driven magnet part; 13 ... Drive gear;
14 ... driven gear; 19 ... internal space;
2 ... Driving magnet part; 3 ... Motor; 4 ... Shaft; 5 ... Case;
10: Gear pump.

Claims (3)

In a magnet-driven constant-capacity supply pump having a liquid suction port, a liquid discharge port, and a pump unit having a driven magnet unit, a driving magnet unit, a motor, and a connecting means for connecting the driving magnet unit and the motor ,
The magnet-driven constant capacity supply pump, wherein the pump unit and the motor are electrically insulated.   The magnet-driven constant-capacity supply pump according to claim 1, wherein the connecting means is made of an insulating material.   The magnet drive type constant capacity supply type pump according to claim 1 or 2, further comprising a support base capable of electrically insulating and fixing the pump unit, the drive magnet unit, and / or the motor.

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