阅读说明：本技术 一种质谱仪电磁铁中的极靴线包体及成形方法 (Pole shoe wire inclusion in mass spectrometer electromagnet and forming method ) 是由 田钱中 李海军 阎瑞 佘永东 林跃武 邹盛强 苗凯 褚辞 黄波 唐雅婷 于 2020-12-30 设计创作，主要内容包括：本发明属于同位素分析技术领域,具体涉及一种质谱仪电磁铁中的极靴线包体及成形方法。极靴线包体包括极靴、绕制在极靴外的线包、包围在线包外部的外封皮,以及覆盖在线包和极靴上表面的上轭板和覆盖在线包和极靴下表面的下轭板；加工好极靴之后,首先在极靴的表面焊接下轭板,安装支撑柱,安装上轭板,上轭板与极靴焊接之后,拆掉支撑柱,在极靴外绕制线包,再次安装支撑柱和轭板,安装外封皮。轭板与极靴焊接,形成一个整体,再与外封皮封装形成一体化的极靴线包体,使极靴线包体具有较高的机械结构强度,长期使用不易变形,相对现有技术,减少了安装线包而塞入钢条带来的装配误差。(The invention belongs to the technical field of isotope analysis, and particularly relates to a pole shoe wire inclusion in a mass spectrometer electromagnet and a forming method. The pole shoe coil body comprises a pole shoe, a coil wound outside the pole shoe, an outer wrapper surrounding the outside of the coil, an upper yoke plate covering the upper surfaces of the coil and the pole shoe and a lower yoke plate covering the lower surfaces of the coil and the pole shoe; after the pole shoe is machined, firstly, a lower yoke plate is welded on the surface of the pole shoe, a supporting column is installed, an upper yoke plate is installed, after the upper yoke plate is welded with the pole shoe, the supporting column is removed, a coil is wound outside the pole shoe, the supporting column and the yoke plate are installed again, and an outer envelope is installed. The yoke plate is welded with the pole shoe to form a whole, and then the yoke plate and the pole shoe are packaged with the outer sealing cover to form an integrated pole shoe wire package body, so that the pole shoe wire package body has higher mechanical structure strength and is not easy to deform after long-term use, and compared with the prior art, the assembling error caused by the fact that a steel bar is stuffed in the pole shoe wire package body when the wire package is installed is reduced.)

1. A pole shoe wire inclusion in a mass spectrometer electromagnet is characterized in that: the pole shoe comprises a pole shoe (1), a coil (4) wound outside the pole shoe (1), an outer cover (5) surrounding the outside of the coil (4), an upper yoke plate (2) covering the upper surfaces of the coil (4) and the pole shoe (1), and a lower yoke plate (3) covering the lower surfaces of the coil (4) and the pole shoe (1);

the coil (4) is an enameled copper wire or a copper strip wound on the pole shoe (1), and the outer cover (5) is a stainless steel sheet welded and surrounded on the outer side surface of the coil (4);

the center of the wound coil (4) is a hole with an irregular shape (1-1), and the cross section of the coil is the same as that of the pole shoe (1);

the coil (4) is welded with the outer cover (5), and the upper yoke plate (2) is welded with the pole shoe (1).

2. A pole piece wire pack in a mass spectrometer electromagnet as claimed in claim 1, wherein: the pole shoe (1) is in a block shape, the cross section of the pole shoe is in a symmetrical irregular shape (1-1), one side (1-2) is in an arc shape, two short sides (1-3) and (1-4) are symmetrical, and the other side (1-5) is in a straight line.

3. A pole piece wire pack in a mass spectrometer electromagnet as claimed in claim 2, wherein: four edges (1-6) of the pole shoe (1) are all processed with rounded corners.

4. A pole piece wire pack in a mass spectrometer electromagnet as claimed in claim 3, wherein: the length of the four edge fillets is the sum of the thicknesses of the upper yoke plate (2), the lower yoke plate (3) and the coil (4).

5. A pole piece wire pack in a mass spectrometer electromagnet as claimed in claim 4, wherein: the thickness of the pole shoe (1) is larger than the sum of the thicknesses of the upper yoke plate (2), the lower yoke plate (3) and the coil (4), and the length of a fillet of four edges (1-6) of the pole shoe (1) is the sum of the thicknesses of the upper yoke plate (2), the lower yoke plate (3) and the coil (4).

6. A pole piece wire pack in a mass spectrometer electromagnet as claimed in claim 1, wherein: the upper yoke plate (2) and the lower yoke plate (3) are the same in shape, the cross sections of the upper yoke plate and the lower yoke plate are the same as those of the coil (4), and the centers of the upper yoke plate and the lower yoke plate are provided with mounting holes with the same irregular shapes (1-1).

7. A pole piece wire pack in a mass spectrometer electromagnet as claimed in claim 6, wherein: the outer edges of the upper yoke plate (2) and the lower yoke plate (3) are slightly larger than the outer edge of the whole body formed by the outer envelope (5) and the coil (4); and a plurality of supporting columns (6) are arranged between the upper yoke plate (2) and the lower yoke plate (3).

8. A pole piece wire pack in a mass spectrometer electromagnet as claimed in claim 6, wherein: the upper end and the lower end of the support column (6) are respectively provided with a threaded hole along the axial direction, and the support column (6) is respectively fixed with the upper yoke plate (2) and the lower yoke plate (3) through screws.

9. A pole piece wire pack in a mass spectrometer electromagnet as claimed in claim 1, wherein: the pole shoe (1) is made of an electrical pure iron DT4C material.

10. A method for forming a pole shoe coil body in an electromagnet of a mass spectrometer is characterized by comprising the following steps:

1) cutting and machining a pole shoe (1);

2) rounding off the edges (1-6) of the pole shoe (1), wherein the length of the rounding off is the sum of the thicknesses of the upper yoke plate (2), the lower yoke plate (3) and the coil (4);

3) a lower yoke plate (3) is welded on the surface of the pole shoe (1);

4) mounting a support column (6) on the outer edge of the lower yoke plate (3);

5) connecting the upper yoke plate (2) with the support column (6);

6) the upper yoke plate (2) is welded with the pole shoe (1);

7) removing the support column (6);

8) a coil (4) is wound outside the pole shoe (1);

9) mounting a support column (6) on the lower yoke plate (3), and then mounting the upper yoke plate (2);

10) the rectangular stainless steel strip is wound outside the coil (4), cut and welded into an outer envelope (5).

Technical Field

The invention belongs to the technical field of isotope analysis, and particularly relates to a pole shoe wire inclusion in a mass spectrometer electromagnet and a forming method.

Background

The electromagnet of the mass spectrometer is a key device of the mass spectrometer. The mass spectrometer electromagnet generally mainly comprises a yoke iron, a pole shoe wire package body and the like. An electromagnet is generally provided with two pole shoe wire wrapping bodies which are respectively an upper part and a lower part, wherein the upper pole shoe and the lower pole shoe are symmetrical in surface and are connected with a yoke iron. The pole shoe and the yoke are made of the same material, and are generally made of electrician pure iron. The upper and lower coils are connected in series through a lead, and a uniform magnetic field is formed between the upper and lower pole shoes after the coils are electrified. Ions of different charge-to-mass ratios pass through the uniform magnetic field, producing a mass separation effect. The magnetic mass spectrometer is used for precisely measuring the abundance and the content of isotopes or different elements by utilizing the principle. The pole shoe wire package body is a core component of the electromagnet, and in the prior art, the pole shoe and the wire package body are independent. The pack body generally comprises an upper yoke plate, a lower yoke plate, an inner cover, an outer cover and an enameled wire pack. The pole shoe is connected with the yoke, and then the pole shoe is sleeved with the wire wrap body. In order to fix the coil pack to the pole piece, a technique is adopted in which a gap is left between the coil pack and the pole piece, and a stainless steel rod or the like is inserted into the gap. Due to the fact that the stainless steel bars are different in thickness and inserting strength, the upper position, the lower position, the left position and the right position of the pole shoe wire bag body are asymmetrical, and finally the magnetic field space distribution cannot reach the optimal level. In addition, in the long-term use process of the electromagnet, under the influence of gravity and mutual attraction force of the upper and lower coil bodies after being electrified, the plugged steel bars are easy to loosen, and therefore the defect that the structural strength is weak in the prior art exists.

Disclosure of Invention

The invention aims to provide a pole shoe wire packet body in a mass spectrometer electromagnet, which has small assembly error and better structural strength.

The technical scheme of the invention is as follows:

a pole shoe wrapping body in a mass spectrometer electromagnet comprises a pole shoe, a wire wrap wound outside the pole shoe, an outer sealing cover surrounding the outside of the wire wrap, an upper yoke plate covering the upper surfaces of the wire wrap and the pole shoe, and a lower yoke plate covering the lower surfaces of the wire wrap and the pole shoe;

the coil is an enameled copper wire or a copper strip wound on the pole shoe, and the outer sealing sheet is a stainless steel sheet welded to surround the outer side surface of the coil;

the center of the wound coil is an irregularly-shaped hole, and the cross section of the wound coil is the same as that of the pole shoe;

the coil is welded with the outer sealing cover, and the upper yoke plate is welded with the pole shoe.

The pole shoe is in a block shape, the cross section of the pole shoe is in a symmetrical irregular shape, one side is in an arc shape, two short sides are symmetrical, and the other side is in a straight line.

Four edges of the pole shoe are all processed with rounded corners.

The length of the four edge fillets is the sum of the thicknesses of the upper yoke plate, the lower yoke plate and the coil.

The thickness of the pole shoe is larger than the sum of the thicknesses of the upper yoke plate, the lower yoke plate and the coil, and the length of four edge fillets of the pole shoe is equal to the sum of the thicknesses of the upper yoke plate, the lower yoke plate and the coil.

The upper yoke plate and the lower yoke plate are the same in shape, the cross sections of the upper yoke plate and the lower yoke plate are the same as the cross sections of the coils, and the centers of the upper yoke plate and the lower yoke plate are provided with the same mounting holes in irregular shapes.

The outer edges of the upper yoke plate and the lower yoke plate are slightly larger than the outer edge of the whole body formed by the outer envelope and the coil; and a plurality of supporting columns are arranged between the upper yoke plate and the lower yoke plate.

The upper end and the lower end of the support column are respectively provided with a threaded hole along the axial direction, and the support column is respectively fixed with the upper yoke plate and the lower yoke plate through screws.

The pole shoe is made of an electrical pure iron DT4C material.

A method for forming a pole shoe wire bag body in a mass spectrometer electromagnet comprises the following steps:

1) cutting and processing pole shoes;

2) rounding corners are formed on edges of the pole shoes, and the length of each rounding corner is the sum of the thicknesses of the upper yoke plate, the lower yoke plate and the coil;

3) welding a lower yoke plate on the surface of the pole shoe;

4) mounting a support column on the outer edge of the lower yoke plate;

5) connecting the upper yoke plate with the support column;

6) the upper yoke plate is welded with the pole shoe;

7) removing the support columns;

8) winding a coil outside the pole shoe;

9) mounting the support column on the lower yoke plate, and then mounting the upper yoke plate;

10) the rectangular stainless steel strip is wound outside a coil, cut and welded into an outer envelope.

The invention has the following remarkable effects: the technical problems that the pole shoe wire bag body is asymmetric up and down and the structural strength is weak due to the fact that the pole shoe wire bag body is fixed by plugging a stainless steel bar are solved.

And welding the upper yoke plate and the lower yoke plate with the pole shoe to form a whole. Then, a coil is wound on the integral piece, the internal height is fixed by the supporting column, and finally, the integrated pole shoe coil body is formed by packaging with an external sealing cover. Through the integrated design, the yoke plate and the pole shoe are directly connected in a welding mode, so that the pole shoe wire wrapping body has higher mechanical structure strength, is not easy to deform after long-term use, and reduces assembly errors caused by the fact that a steel bar is stuffed into the wire wrapping body when the wire wrapping body is installed compared with the prior art.

The pole shoe coil body has the advantages of simple structure, one-step forming, high installation precision and good mechanical structure strength.

Drawings

FIG. 1 is a schematic diagram of a pole piece coil package in a mass spectrometer electromagnet;

FIG. 2 is a schematic diagram of a pole shoe wire enclosure part in a mass spectrometer electromagnet;

FIG. 3 is a schematic view of a pole piece;

FIG. 4 is a schematic view of a coil;

FIG. 5 is a schematic view of an outer cover;

FIG. 6 is a schematic view of the upper yoke plate;

FIG. 7 is a schematic view of a lower yoke plate;

FIG. 8 is a schematic view of a support post;

in the figure: 1. the pole shoe, 2, the upper yoke plate, 3, the lower yoke plate, 4, the coil, 5, the outer sealing skin and 6, the supporting column;

1-1. irregular shape; 1-2, one edge; 1-3. short side; 1-4. short side; 1-5. the other edge; 1-6. arrises.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

As shown in fig. 1 and 2, the pole shoe coil body in the mass spectrometer electromagnet comprises a pole shoe 1, a coil 4 wound outside the pole shoe 1, an outer envelope 5 surrounding the coil 4, an upper yoke plate covering the upper surfaces of the coil 4 and the pole shoe 1, and a lower yoke plate 3 covering the lower surfaces of the coil 4 and the pole shoe 1.

As shown in figure 3, the pole shoe 1 is block-shaped, the section is in a symmetrical irregular shape 1-1, one side 1-2 is in a circular arc shape, two short sides 1-3 and 1-4 are symmetrical, and the other side 1-5 is in a straight line. Four edges 1-6 of the pole shoe 1 are all processed with round corners. Meanwhile, a screw hole is processed on the pole shoe 1 and used for fixedly mounting the pole shoe 1.

The length of the four-edge rounded corners is the sum of the thicknesses of the upper yoke plate 2, the lower yoke plate and the coil package 4, and one end of the lower ends of the four edges is not processed with a rounded corner. I.e. the pole shoe 1 has a thickness greater than the sum of the thicknesses of the upper yoke plate 2, the lower yoke plate and the coil 4. The effect of the design is as follows: a step is formed on the pole piece on which the lower yoke plate 3 is placed. Because the lower yoke plate 3 has a better flatness when welded on a flat table.

As shown in fig. 4, the center of the wound coil 4 is a hole with an irregular shape 1-1, and the cross-sectional shape of the wound coil is the same as that of the pole shoe 1.

As shown in fig. 5, the outer cover 5 is a rectangular stainless steel sheet with a thickness of 0.5mm welded around the outside of the coil package 4.

As shown in fig. 6 and 7, the upper yoke plate 2 and the lower yoke plate 3 have the same shape, the same cross section as the coil 4, and have the same mounting hole with irregular shape 1-1 at the center.

In order to mount a plurality of support posts 6 between the upper yoke plate 2 and the lower yoke plate 3, the outer edges of the upper yoke plate 2 and the lower yoke plate 3 are slightly larger than the outer edge of the whole body consisting of the outer cover 5 and the package 4.

As shown in fig. 8, threaded holes are machined in the upper and lower ends of the support column 6 in the axial direction, respectively, so that the support column 6 is fixed to the upper yoke plate 2 and the lower yoke plate 3 by screws, respectively.

When the pole shoe 1 is installed, after cutting processing is finished, partial rounding treatment is carried out on four edges 1-6 on the side face.

The pole shoe 1 and the lower yoke plate 3 are welded, and then the supporting column 6 is installed on the lower yoke plate 3 through screws, and the supporting column 6 can be uniformly arranged between the upper yoke plate 2 and the lower yoke plate 3 in a plurality, 5 in the embodiment.

The upper yoke plate 2 and the support column 6 are connected by screws. In order to maintain the flatness of the upper yoke plate 2, the upper yoke plate 2 is integrally welded to the pole piece 1.

Then, screws respectively connected with the support column 6 and the upper yoke plate 2 and the lower yoke plate 3 are removed, and the support column 6 is taken off;

winding a wire pack 4 outside the pole shoe 1 by using a winding machine, and after the winding is finished, mounting the support pillar 6 on the lower yoke plate 3 and mounting the upper yoke plate 2 at the same time; the connecting screw is tightened.

The rectangular stainless steel strip is wound outside the coil pack 4, cut and welded into an outer cover 5, and a lead hole is reserved on the outer cover 5 at a specific position according to requirements.

The pole shoe 1 is made of an electrical pure iron DT4C material, and the coil 4 is made of an enameled copper wire or a copper strip by winding.