CN219017574U

CN219017574U - Clamp for manufacturing cathode filament

Info

Publication number: CN219017574U
Application number: CN202223560187.XU
Authority: CN
Inventors: 王睿; 杨少华; 李皓云; 陈颖川; 黄帅; 杨松; 宋祎鹏; 易俗; 冉敬国
Original assignee: Sichuan Honghua Industrial Co ltd
Current assignee: Sichuan Honghua Industrial Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-12
Anticipated expiration: 2032-12-30

Abstract

The application belongs to the technical field of manufacturing of cathode filaments of gas isotope mass spectrometers, and particularly relates to a clamp for manufacturing cathode filaments; this anchor clamps include: a fixed base and a pressure head device; a base, an insulating spacer and a fixed electrode; the fixed base comprises a base, an insulating spacer and a fixed pole which are sequentially overlapped and installed; the cathode filament is placed in a groove formed by the fixed electrode, the cathode ceramic plate is placed in the groove of the base, and two nickel sheet brackets of the cathode are respectively positioned at the left side and the right side of the insulating spacer; the pressure head device is arranged above the fixed base and is used for pressing the cathode filament to the side of the two nickel sheet brackets of the cathode. The fixture can be welded with cathode filaments at two ends through one-time spot welding, and the problem that the filaments are contacted with an electronic shielding cover is not easy to cause.

Description

Clamp for manufacturing cathode filament

Technical Field

The application belongs to the technical field of manufacturing of cathode filaments of gas isotope mass spectrometers, and particularly relates to a clamp for manufacturing of cathode filaments.

Background

The ion source of the gas isotope mass spectrometer is an electron bombardment type ion source and consists of a molecular beam former, an electron emission cathode, an ionization box and an electrostatic lens system. The electron emitting cathode is the most critical part, and its structure adopts ceramic plate fixed type, and tungsten wire with diameter of 0.15mm and length of 8mm is used as emitting cathode, and is fixed on nickel sheet support, and window type electron shielding cover is mounted, and has the same potential as cathode. Electrons generated by heating the cathode filament are accelerated to about 100eV and enter the ionization chamber, and then bombard the sample to generate ion fragments. When a gas isotope mass spectrometer performs sample analysis, a cathode is subjected to high voltage for a long time. If the manufacturing process level of the filament is insufficient, the gas isotope mass spectrometer is easy to break due to temperature rise or voltage and current change in the working operation of the mass spectrometer, so that the gas isotope mass spectrometer cannot work, and the cathode filament breaks, which is a common mass spectrometer fault, so that the cathode manufacturing process is high, the service life of the gas isotope mass spectrometer can be effectively prolonged, the maintenance frequency is reduced, and the method has important significance for maintenance and stable operation of the gas isotope mass spectrometer.

Disclosure of Invention

The purpose of the application is to provide a fixture for manufacturing a cathode filament, and solve the problem of breakage of the cathode filament.

The technical scheme for realizing the purpose of the application comprises the following steps:

the embodiment of the application provides a anchor clamps for negative pole filament preparation, anchor clamps include: a fixed base and a pressure head device; a base, an insulating spacer and a fixed electrode;

the fixed base comprises a base, an insulating spacer and a fixed pole which are sequentially overlapped and installed; the cathode filament is placed in a groove formed by the fixed electrode, the cathode ceramic plate is placed in the groove of the base, and two nickel sheet brackets of the cathode are respectively positioned at the left side and the right side of the insulating spacer;

the pressure head device is arranged above the fixed base and is used for pressing the cathode filament to the side of the two nickel sheet brackets of the cathode.

Optionally, a cylinder for being mounted on a lower end welding bracket of the electronic pulse spot welder is arranged at the lower end of the base.

Optionally, the indenter device includes: the device comprises a pressure head seat, a first clamping column, a second clamping column, a first spring, a second spring, a third spring, a fourth spring, a first fixing bolt and a second fixing bolt;

the first clamping column and the second clamping column are arranged in a groove below the pressure head seat, and a first spring, a second spring, a third spring and a fourth spring are arranged between the first clamping column and the second clamping column; the first fixing bolt and the second fixing bolt are respectively fixed on the first clamping column and the second clamping column and are used for fixing the cathode filament.

Optionally, a cylinder for fixing the spot welding needle of the electronic pulse spot welding machine is arranged at the upper end of the pressure head seat.

Optionally, the base, the insulating spacer and the fixed pole are fixed by using screws of M3.

The beneficial technical effects of this application lie in:

the embodiment of the application provides a fixture for cathode filament preparation can be through the spot welding of once, welds the cathode filament at both ends simultaneously, and is difficult for causing the problem that filament and electron shield contacted, and the technical experience requirement to the operator is also not high, very big improvement cathode preparation's success rate, can effectually improve the operation duration of gas isotope mass spectrometer, reduce the maintenance frequency of gas isotope mass spectrometer. The method effectively eliminates the influence of artificial factors on cathode manufacture, and can finish the spot welding work of cathode filaments at two ends through one spot welding, thereby greatly improving the efficiency and success rate of cathode manufacture.

Drawings

Fig. 1 is a schematic structural diagram of a fixture for manufacturing a cathode filament according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a press head device in a fixture for manufacturing a cathode filament according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a fixing base in a fixture for manufacturing a cathode filament according to an embodiment of the present application;

fig. 4 is an assembly completion view of a fixture for cathode filament fabrication according to an embodiment of the present application;

fig. 5 is an assembly completion view of a press head device in a fixture for manufacturing a cathode filament according to an embodiment of the present application;

fig. 6 is an assembly completion view of a fixing base in a fixture for manufacturing a cathode filament according to an embodiment of the present application.

In the figure:

1-a base; 2-insulating spacers; 3-a fixed pole; 4-a pressure head seat; 5-a first clip; 6-a second clamping column; 7-a first spring; 8-a second spring; 9-a third spring; 10-fourth springs; 11-a first fixing bolt; 12-a second fixing bolt.

Detailed Description

In order to better understand the present application, a clear and complete description of the technical solutions in the embodiments of the present application will be provided below with reference to the drawings in the embodiments of the present application. It will be apparent that the embodiments described below are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by a person skilled in the art without the exercise of inventive faculty, are within the scope of protection of the present application, based on the embodiments described herein.

In the description of the embodiments of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience in describing the embodiments of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present application.

The inventor of the application found in the study that the manufacturing difficulty of the cathode is spot welding of the cathode filament, namely spot welding the cathode filament (such as tungsten filament) onto the nickel sheet bracket; the filament and the bracket are well insulated from the shielding window in a narrow space. Even after the filament spot welding is successful, the filament and the shielding window are easy to conduct, so the spot welding of the cathode filament has high requirements on experience and technology of operators.

Therefore, the fixture for manufacturing the cathode filament provided by the embodiment of the application can be used for welding the cathode filaments at two ends through one-time spot welding, the problem that the filaments are contacted with the electronic shielding cover is not easy to cause, the technical experience requirement on an operator is not high, the success rate of manufacturing the cathode is greatly improved, the operation duration of a gas isotope mass spectrometer can be effectively prolonged, and the maintenance frequency of the gas isotope mass spectrometer is reduced.

Based on the foregoing, for clarity and detailed description of the above-described advantages of the present application, a detailed description of the embodiments of the present application will be provided below with reference to the accompanying drawings.

Referring to fig. 1, a schematic structural diagram of a fixture for manufacturing a cathode filament according to an embodiment of the present application is shown.

The embodiment of the application provides a anchor clamps for negative pole filament preparation, include: a fixed base and a pressure head device; a base 1, an insulating spacer 2 and a fixed pole 3;

the fixed base comprises a base 1, an insulating spacer 2 and a fixed pole 3 which are sequentially overlapped and installed; the cathode filament is placed in a groove formed by the fixed electrode 3, the cathode ceramic plate is placed in the groove of the base 1, and two nickel sheet brackets of the cathode are respectively positioned at the left side and the right side of the insulating spacer 2, as shown in fig. 3; fig. 6 is an assembly completion view showing a fixing base by way of example.

In practical application, the cathode filament is placed in the groove formed by the fixed electrode 3, then the cathode ceramic plate is placed in the groove of the base 1, at the moment, the two nickel sheet supports of the cathode are respectively positioned at the left side and the right side of the insulating spacer 2, the pressure head device is controlled to be downward by stepping on the pedal of the electronic pulse spot welder, the cathode filament is pressed to the side of the two nickel sheet supports of the cathode, and the button of the spot welder is clicked manually, so that the cathode filament is spot welded on the two nickel sheet supports of the cathode at the same time, and the aim of finishing one-time spot welding of the cathode filament is fulfilled.

In one example, the lower end of the base 1 is provided with a cylinder for mounting on a lower end welding bracket of an electronic pulse spot welder. Fig. 4 shows, by way of example, an assembly-completed view of a fixture for cathode filament fabrication.

In some possible implementations of the embodiments of the present application, as shown in fig. 2, the ram device includes: the pressure head seat 4, the first clamping column 5, the second clamping column 6, the first spring 7, the second spring 8, the third spring 9, the fourth spring 10, the first fixing bolt 11 and the second fixing bolt 12;

the first clamping column 5 and the second clamping column 6 are arranged in a groove below the pressure head seat 4, and a first spring 7, a second spring 8, a third spring 9 and a fourth spring 10 are arranged between the first clamping column 5 and the second clamping column 6; the first fixing bolt 11 and the second fixing bolt 12 are respectively fixed on the first clamping column 5 and the second clamping column 6 and are used for fixing the cathode filament. Fig. 5 shows by way of example an assembly completion of a ram device in a fixture for cathode filament production.

In one example, the upper end of the ram seat 4 is provided with a cylinder for fixing to a spot welding needle of an electronic pulse spot welding machine.

In the specific implementation, the base 1, the insulating spacer 2 and the fixed pole 3 can be fixed by using screws of M3.

In practical application, the base 1, the insulating spacer 2 and the fixed electrode 3 can be sequentially overlapped and installed by using a screw of M3 to form a complete base, and then the lower end cylinder of the complete base is installed on a lower end welding bracket of the electronic pulse spot welder; the first clamping post 5 and the second clamping post 6 are arranged in the groove of the pressure head seat 4, four springs are arranged between the first clamping post 5 and the second clamping post 6, and then the first fixing bolt 11 and the second fixing bolt 12 are arranged. Fixing the pressure head device at the position of a spot welding needle of the electronic pulse spot welding machine; and finally, the fixed base and the pressure head device are both arranged on the electronic pulse spot welder. The cathode filament is placed in the groove formed by the fixed electrode 3, then the cathode ceramic plate is placed in the groove of the base 1, at the moment, the two nickel sheet supports of the cathode are respectively positioned at the left side and the right side of the insulating spacer 2, the cathode filament is pressed to the side of the two nickel sheet supports of the cathode, the first fixing bolt 11 and the second fixing bolt 12 are screwed tightly to fix the cathode filament, and the button of the spot welder is manually clicked, so that the cathode filament is simultaneously spot-welded on the two nickel sheet supports of the cathode, and the aim of completing one-time spot welding of the cathode filament is fulfilled.

While the present application has been described in detail with reference to the drawings and the embodiments, the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application. None of the details described in this application may be prior art.

Claims

1. A fixture for cathode filament fabrication, the fixture comprising: a fixed base and a pressure head device; a base (1), an insulating spacer (2) and a fixed pole (3);

the fixed base comprises a base (1), an insulating spacer (2) and a fixed pole (3) which are sequentially overlapped and installed; the cathode filament is placed in a groove formed in the fixed electrode (3), the cathode ceramic plate is placed in the groove of the base (1), and two nickel sheet supports of the cathode are respectively positioned at the left side and the right side of the insulating spacer (2);

2. A fixture for cathode filament production according to claim 1, characterized in that the lower end of the base (1) is provided with a cylinder for mounting on a lower end welding support of an electronic pulse spot welder.

3. The fixture for cathode filament production of claim 1, wherein the indenter device comprises: the device comprises a pressure head seat (4), a first clamping column (5), a second clamping column (6), a first spring (7), a second spring (8), a third spring (9), a fourth spring (10), a first fixing bolt (11) and a second fixing bolt (12);

the first clamping column (5) and the second clamping column (6) are arranged in a groove below the pressure head seat (4), and a first spring (7), a second spring (8), a third spring (9) and a fourth spring (10) are arranged between the first clamping column (5) and the second clamping column (6); the first fixing bolt (11) and the second fixing bolt (12) are respectively fixed on the first clamping column (5) and the second clamping column (6) and are used for fixing the cathode filament.

4. A fixture for cathode filament production according to claim 3, characterized in that the upper end of the press holder (4) is provided with a cylinder for fixing to the spot welding needle of an electronic pulse spot welding machine.

5. The fixture for manufacturing the cathode filament according to claim 1, wherein the base (1), the insulating spacer (2) and the fixed electrode (3) are fixed by using screws of M3.