JPS5925573A - Electromagnetic pump - Google Patents

Abstract

PURPOSE:To enable to perform efficiently exchange work of a core in an inside cylindrical duct by a method wherein hollow members of the plural number are separatedly arranged in a space part formed between the inside cylindrical duct and an outside cylindrical duct. CONSTITUTION:The hollow members of five pieces of the core inserting part 20 at the edge part of the inside cylindrical duct 4 to face to the space part 10 formed between the inside cylindrical duct 4 and the outside cylindrical duct 8 are separatedly arranged at the space part 10. Both the edge parts on the opening side of the hollow members thereof are connected to the outside cylindrical duct 8 and the inside cylindrical duct 4. Moreover opening parts of five pieces to communicate with the hollow members are formed to the outside cylindircal duct 8 to face to the inside cylinrical duct 4. A press board 26 is provided at the core inserting part 20 of the inside cylindrical duct 4. The core 2 is covered with a cover interposing an interval between them enabling to take out outside or to take in from the outside through the space parts of the hollow members, and are formed in a block.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic pump, and particularly to an annular linear induction type electromagnetic pump.

Electromagnetic pumps have traditionally been used to drive sodium, the cooling medium in fast breeder reactors.

An example of the conventional electromagnetic pump is an annular linear inductor type electromagnetic pump.

As shown in FIG. 1, this electromagnetic pump includes an inner cylindrical duct 4 which is formed into a roughly cylindrical shape and includes an iron core 2 in its thick wall along the axial direction, and an outer periphery that includes the inner duct 4. It has an outer cylinder duct 8 to which a coil 6 is attached, and an inner cylinder duct 4.
A space 10 is formed between one end in the axial direction and the outer cylinder and duct 8 facing this end, and the fluid inside the inner side 12 of the inner cylinder duct 4 and the inner cylinder duct 4 are connected to each other via this space 1o. The fluid on the outside 112 of the pipe is configured to merge with the fluid on the outside 112 of the pipe.

Note that an iron core 16 is attached to the coil 6.

The electromagnetic Zeng shown in Fig. 1 is similar to the general O-induction or inktion type linear motor, in which a coil 6, which is a stator coil, is excited with multiphase alternating current to generate a linear moving magnetic field. It utilizes the force that acts on the fluid due to the interaction between the induced current in the fluid interlinked with the magnetic field and the moving magnetic field.

By the way, when replacing the iron core 2 of the electromagnetic pump, since the outer cylinder duct 8 is sealed,
There was a drawback that this outer cylinder duct 8 had to be cut open.

The present invention has been made in view of the above-mentioned conventional problems.
The purpose is to provide an electromagnetic pump that allows easy replacement of the iron core provided in the inner duct.

In order to achieve the above object, the present invention includes an inner cylinder duct which is formed into a substantially cylindrical shape and includes an iron core in a thick wall portion along the axial direction thereof, and a coil is attached to the outer circumference of the inner cylinder duct. A space is formed between one end of the inner duct in the axial direction and the outer duct opposite the end, and the inner duct is connected to the inner duct through the space. In an electromagnetic pump in which an inner fluid and a fluid outside the inner cylinder duct join together, a plurality of hollow members that abut an iron core insertion portion at an end of the inner cylinder duct that looks into the space are spaced apart in the space, and Both ends of the hollow member on the opening side are connected to the outer cylinder duct and the inner cylinder duct, and a plurality of openings communicating with the hollow member are formed in the outer cylinder duct that looks into the space. It is characterized by

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 2 shows a cross-sectional view of a preferred embodiment of the invention. Also, Fig. 3 shows a top view of Fig. 2, Fig. 4 shows a sectional view taken along line A-Ad of Fig. 2, and Fig. 5 shows a cross-sectional view taken along line B-B of Fig. 2. A cross-sectional view of each is shown.

The electromagnetic pump in this embodiment includes five hollow members 2 that abut on an iron core insertion part 20 at the end of the inner cylinder duct 4 and looking into the space 10 formed between the inner cylinder duct 4 and the outer cylinder duct 8.
2 are spaced apart from each other in the space 10, both ends of the hollow members 22 on the opening side are connected to the outer cylinder duct 8 and the inner cylinder duct 4, and the outer cylinder duct 8 is connected to the inner cylinder duct 4. This pump differs from the electromagnetic pump shown in FIG. 1 in that five openings 24 are formed that communicate with the hollow member 22. Further, a presser plate 26 is provided on the core insertion portion 20 of the inner cylinder duct 4. Further, the iron core 2 is covered with a cover 28 to form a block at intervals that allow it to be carried outside or carried in from the outside through the space of the hollow member 22.

In this way, the electromagnetic pump in this embodiment has a plurality of hollow members spaced apart from each other in the space formed between the inner cylinder duct and the outer cylinder duct, so that the fluid inside the inner cylinder duct and the inner cylinder duct can be connected to each other. It does not prevent the outside fluid from merging. Further, the iron core in the inner duct can be carried out and brought in from the outside through the space of the hollow member and the opening formed in the outer duct, without cutting the inner and outer ducts.

As explained above, according to the present invention, there is no need to cut open the duct when replacing the iron core in the inner cylinder duct, so there is an excellent effect that the efficiency of the replacement work can be improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional electromagnetic pump, FIG. 2 is a sectional view showing an embodiment of the present invention, and FIG. 3 is a top view of the main parts of FIG.
4 is a sectional view taken along the line AA in FIG. 2, and FIG. 5 is a sectional view taken along the line BB in FIG. 2. 2... Iron core, 4... Inner cylinder duct, 8... Outer cylinder duct, written by Kaya ZW 1 bm 367--

Claims (1)

[Claims] 1. An inner duct that is formed into a roughly cylindrical shape and includes an iron core in its thick wall along the axial direction, and an outer duct that includes this inner duct and has a coil attached to its outer periphery. A space is formed between one end in the axial direction of the inner cylinder duct and an outer cylinder duct opposite to this end, and the fluid inside the inner cylinder duct and the protruding inner cylinder are communicated through this space. In an electromagnetic pump in which fluid from the outside of the duct joins, a plurality of hollow members that contact the core insertion portion at the end of the inner cylinder duct that looks into the space are spaced apart from each other in the space, and both ends of these hollow members on the opening side are arranged in the space. The electromagnetic pump is characterized in that the outer cylinder duct is connected to the outer cylinder duct and the inner cylinder duct, and a plurality of openings communicating with the hollow member are formed in the outer cylinder duct that looks into the space part. .