X-ray tube filament welding device and height adjustment method

Abstract

The application relates to the technical field of X-ray tubes, in particular to an X-ray tube filament welding device and a height adjusting method. The X-ray tube filament welding device comprises a sleeve, an adjusting bolt and a filament assembly. A bottom screw hole is arranged at the center of a sleeve bottom plate, the adjusting bolt is connected in the bottom screw hole, the filament assembly comprises a cathode support seat, a filament insulating column, a filament lead column and a filament, a recess is arranged on the top surface of an adjusting disc, the bottom ends of the two filament lead columns are connected on the bottom surface in the recess, a side screw hole is arranged on the side wall of the sleeve, a fixing screw is threadedly connected in the side screw hole, the front end of the fixing screw is in abutment with the side surface of the cathode support seat, and a locking nut is connected on the adjusting bolt. The application has the advantages of simple and reliable structure, flexible use, wide adaptability, stable operation, guaranteed X-ray tube filament welding quality, guaranteed product quality, reduced work difficulty of X-ray tube filament welding, effectively reduced waste rate, saved manpower and material resources.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of X-ray tube, in particular to an X-ray tube filament welding device and height adjusting method. BACKGROUND

[0002] As the filament of the electron emission source of the X-ray tube, the installation height of the filament determines the focusing effect of the electron beam, the size of the focal point and the definition of the image, thereby affecting the service life of the X-ray tube.

[0003] In the actual development and production process, the height of the filament of the X-ray tube is too high or too low, which affects the emission capacity and focusing effect of the electron beam. If the height is too high, the focusing effect is poor and the laminar flow of the electron beam is not good; if the height is too low, the electron emission efficiency is low, and the tube current cannot meet the working requirements. SUMMARY

[0004] The purpose of the present application is to provide an X-ray tube filament welding device and height adjusting method, which can conveniently determine the installation height of the filament and avoid the problem of difficult control of the welding position of the filament assembly.

[0005] To solve the above technical problems, the present application provides an X-ray tube filament welding device, which comprises a sleeve, an adjusting bolt and a filament assembly. The sleeve comprises a side wall and a bottom plate, and a bottom screw hole is arranged at the center of the bottom plate of the sleeve. The adjusting bolt is connected in the bottom screw hole. The filament assembly comprises a cathode support seat, a filament insulating column, a filament lead column and a filament. Two lead column holes I are arranged on the cathode support seat. Insulating column holes are arranged below the two lead column holes I, and the inner diameter of the insulating column holes is larger than that of the lead column holes I. The two insulating column holes are coaxial with the two lead column holes I. Two filament insulating columns are arranged, and the two filament insulating columns are connected in the two insulating column holes respectively. Lead column holes II and solder holes are arranged on the filament insulating column. The solder holes are coaxially arranged at the lower end of the lead column holes II, and the inner diameter of the solder holes is larger than that of the lead column holes II. The solder holes are coaxial with the lead column holes II. Two lead column holes II are coaxial with the two lead column holes I respectively. Two filament lead columns are arranged, and the two filament lead columns are connected in the two lead column holes I respectively. The lower parts of the two filament lead columns are connected in the two lead column holes II respectively. The lower ends of the two filament lead columns extend out of the two lead column holes II respectively. The filament is connected between the two filament lead columns. The filament is connected at the top end of the two filament lead columns. A pure silver solder wire is connected in the solder hole. The top end of the adjusting bolt is connected with an adjusting disc. The bottom ends of the two filament lead columns are connected on the top surface of the adjusting disc.

[0006] In actual design and use, a certain design allowance can be left in the inner diameter of the sleeve, so that the device can be used with most industrial X-ray tube filament assemblies.

[0007] Further, the sleeve side wall is provided with a side screw hole, and a fixing screw is threadedly connected in the side screw hole.

[0008] The fixing screw locks the cathode support seat, and then the cathode support seat is placed to be displaced by a subsequent work filament assembly.

[0009] Further, the adjusting disc top surface is provided with a groove, and the two filament lead columns are connected to the groove inner bottom surface.

[0010] The filament lead column bottom end is connected to the groove inner bottom surface, so that the height of the filament lead column is changed with the height change of the adjusting disc during height adjustment.

[0011] The two filament lead column bottom ends are connected to the groove inner bottom surface, so that the filament lead column and the filament are prevented from shaking during height adjustment.

[0012] Further, the adjusting disc bottom surface is provided with a bottom groove, and the adjusting bolt top end is rotationally connected in the bottom groove.

[0013] The bottom groove is provided to limit the adjusting bolt, so that the adjusting disc is prevented from being separated from the adjusting bolt.

[0014] Further, the adjusting bolt is connected with a locking nut, and the locking nut is connected to the sleeve bottom plate lower end.

[0015] The locking nut is provided to lock the adjusting bolt, so that the height of the adjusting disc is prevented from being changed after the adjusting bolt is accidentally rotated.

[0016] Further, the side screw hole is provided with a plurality of side screw holes on the sleeve side wall, the plurality of side screw holes are circumferentially distributed around the sleeve center, each side screw hole is connected with a fixing screw, and the plurality of fixing screw front ends are abutted on the cathode support seat side surface.

[0017] Further, the sleeve, the adjusting disc, the adjusting bolt and the locking nut are coaxial.

[0018] The sleeve, the adjusting nut, the adjusting bolt and the adjusting disc are on the same axis, so that the components are balanced during adjustment, and the filament assembly and the sleeve are coaxial as much as possible during use, and the plurality of fixing screws can be adjusted.

[0019] A height adjustment method of an X-ray tube filament welding device, comprising the following steps:

[0020] S1. connecting the locking nut to the adjusting bolt, rotating the adjusting bolt into the bottom screw hole, not tightening the locking nut, rotating the fixing screw into the side screw hole, and not extending the fixing screw front end out of the sleeve side wall;

[0021] S2. Insert the two filament lead posts into the lead post holes II of the two filament insulation posts respectively, and place pure silver solder wires in the two solder holes;

[0022] S3. Install the cathode support seat into the sleeve, rotate the cathode support seat to make the two lead post holes I parallel to the grooves on the adjusting disc, and lock the cathode support seat by using the front end of the fixing screw;

[0023] S4. Adjust the two filament lead posts and the adjusting bolt respectively, so that the bottom ends of the filament lead posts are connected to the bottom surface in the grooves;

[0024] S4.1. If the bottom ends of the filament lead posts completely fit the bottom surface in the grooves in step S3, proceed to the subsequent steps;

[0025] S4.2. If the bottom ends of the filament lead posts do not completely fit the bottom surface in the grooves in step S3, loosen the fixing screw tightened in step S2, rotate the cathode support seat again until the bottom ends of the filament lead posts completely fit the bottom surface in the grooves, then tighten the fixing screw to lock the cathode support seat, and then proceed to the subsequent steps;

[0026] S5. Measure the height of the top surface of the filament lead posts and the top surface of the cathode support seat, and record it as the measured height. Compare the measured height with the assembly accurate size. When the measured height does not match the assembly accurate size, adjust the adjusting bolt until the measured height matches the assembly accurate size, and then lock the lock nut;

[0027] S6. Put the device completed in step S5 into a hydrogen furnace, raise the temperature of the hydrogen furnace to 960 DEG C, and keep it for 8 minutes, and then naturally cool it to room temperature;

[0028] S7. After completing step S6, loosen the fixing screw, and slowly take out the filament assembly from the sleeve, and complete the welding of the filament assembly.

[0029] Further, the pure silver solder wire is DHLAg-2.

[0030] The beneficial effects of the present application are:

[0031] 1. The sleeve can be used with various sizes of industrial X-ray tube filament assemblies, has a wide range of use, and has strong adaptability;

[0032] 2. The fixing screw locks the cathode support seat, and then places it in the subsequent work, so that the filament assembly is displaced, and the processing accuracy is ensured;

[0033] 3. The bottom ends of the filament lead posts are connected to the bottom surface in the grooves, so that the height of the filament lead posts changes with the height of the adjusting disc when the height is adjusted, and the use is flexible;

[0034] 4. The bottom ends of both filament lead posts are connected to the bottom surface of the groove to prevent the filament lead posts and filament from shaking when adjusting the height, thus ensuring the stability of the adjustment;

[0035] 5. The locking nut is designed to secure the adjusting bolt, preventing the height of the adjusting disc from changing if the adjusting bolt is accidentally rotated.

[0036] 6. This invention has a simple and reliable structure, is flexible in use, has a wide range of applications, and is stable in operation. It effectively ensures the welding quality of X-ray tube filaments, thereby ensuring product quality, reducing the difficulty of X-ray tube filament welding, effectively reducing scrap rate, and saving manpower and resources. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the present invention;

[0038] Figure 2 For the present invention Figure 1 Local magnification Figure I ;

[0039] Figure 3 This is a cross-sectional view of the filament assembly of the present invention;

[0040] Figure 4 This is a cross-sectional view of the filament insulating post of the present invention;

[0041] Figure 5 This is a cross-sectional view of the adjustment disc of the present invention.

[0042] In the diagram: 1. Sleeve; 101. Bottom screw hole; 102. Side screw hole; 2. Locking nut; 3. Adjusting bolt; 4. Adjusting disc; 41. Groove; 42. Bottom groove; 5. Filament assembly; 51. Cathode support; 511. Lead post hole I; 512. Insulating post hole; 52. Filament insulating post; 521. Lead post hole II; 522. Solder hole; 53. Filament lead post; 54. Filament; 6. Fixing screw; 7. Pure silver solder wire. Detailed Implementation

[0043] Example 1:

[0044] like Figures 1-5As shown, an X-ray tube filament welding device includes a sleeve 1, an adjusting bolt 3 and a filament assembly 5. The sleeve 1 includes a side wall and a bottom plate. A bottom screw hole 101 is arranged at the center of the bottom plate of the sleeve 1. The adjusting bolt 3 is connected in the bottom screw hole 101. The filament assembly 5 includes a cathode support 51, filament insulation posts 52, filament lead posts 53 and a filament 54. Two lead post holes I 511 are arranged on the cathode support 51. Two insulation post holes 512 are arranged below the two lead post holes I 511. The inner diameter of the insulation post hole 512 is larger than that of the lead post hole I 511. The two insulation post holes 512 are coaxial with the two lead post holes I 511. Two filament insulation posts 52 are arranged. The two filament insulation posts 52 are connected in the two insulation post holes 512. The filament insulation post 52 is provided with a lead post hole II 521 and a solder hole 522. The solder hole 522 is coaxially arranged at the lower end of the lead post hole II 521. The inner diameter of the solder hole 522 is larger than that of the lead post hole II 521. The solder hole 522 is coaxial with the lead post hole II 521. The two lead post holes II 521 are coaxial with the two lead post holes I 511. Two filament lead posts 53 are arranged. The two filament lead posts 53 are connected in the two lead post holes I 511. The lower parts of the two filament lead posts 53 are connected in the two lead post holes II 521. The lower ends of the two filament lead posts 53 extend out of the two lead post holes II 521. The filament 54 is connected between the two filament lead posts 53. The filament 54 is connected at the top end of the two filament lead posts 53. The solder hole 522 is connected with a pure silver solder wire 7. The adjusting bolt 3 is connected with an adjusting disc 4. The bottom ends of the two filament lead posts 53 are connected on the top surface of the adjusting disc 4.

[0045] Further, the side wall of the sleeve 1 is provided with a side screw hole 102. The side screw hole 102 is threadedly connected with a fixing screw 6. The front end of the fixing screw 6 abuts against the side surface of the cathode support 51.

[0046] Further, the top surface of the adjusting disc 4 is provided with a groove 41. The bottom ends of the two filament lead posts 53 are connected on the inner bottom surface of the groove 41.

[0047] Further, the bottom surface of the adjusting disc 4 is provided with a bottom groove 42. The top end of the adjusting bolt 3 is rotatably connected in the bottom groove 42.

[0048] Further, the adjusting bolt 3 is connected with a locking nut 2. The locking nut 2 is connected at the lower end of the bottom plate of the sleeve 1.

[0049] Further, the side wall of the sleeve 1 is provided with a plurality of side screw holes 102. The plurality of side screw holes 102 are circumferentially distributed around the center of the sleeve 1. Each of the side screw holes 102 is connected with a fixing screw 6. The front ends of the plurality of fixing screws 6 abut against the side surface of the cathode support 51.

[0050] Further, the sleeve 1, the adjusting disc 4, the adjusting bolt 3 and the locking nut 2 are coaxial.

[0051] In the first embodiment, the side screw hole 102 and the fixing screw 6 are each provided with three.

[0052] In the device, the sleeve 1, the adjusting nut 2, the adjusting bolt 3 and the adjusting disc 4 are on the same axis, which ensures the force balance of each component during adjustment, and attention should be paid to making the filament assembly 5 coaxial with the sleeve 1 during use, which can be adjusted by adjusting the fixing screws 6.

[0053] The bottom end of the filament lead column 53 is connected to the bottom surface in the groove 41, which ensures that the height of the filament lead column changes with the height of the adjusting disc 4 during height adjustment.

[0054] In actual design and use, a certain design allowance can be left in the inner diameter of the sleeve 1, so that the device can be used with most industrial X-ray tube filament assemblies.

[0055] The bottom end of the filament lead column 53 is connected to the bottom surface in the groove 41, which ensures that the height of the filament lead column changes with the height of the adjusting disc 4 during height adjustment.

[0056] The fixing screw 6 locks the cathode support seat 51 after being placed in the subsequent work filament assembly 5 to avoid displacement.

[0057] The locking nut 2 is arranged to lock the adjusting bolt 3, which prevents the height of the adjusting disc 4 from changing after the adjusting bolt 3 is accidentally rotated.

[0058] Embodiment II

[0059] A height adjustment method of an X-ray tube filament welding device, comprising the following steps:

[0060] S1. Connect the locking nut 2 to the adjusting bolt 3, screw the adjusting bolt 3 into the bottom screw hole 101, and do not tighten the locking nut 2 first, screw the fixing screw 6 into the side screw hole 102, and do not make the front end of the fixing screw 6 protrude out of the side wall of the sleeve 1 first;

[0061] S2. Insert the two filament lead columns 53 into the lead column holes II 521 of the two filament insulating columns 52, and place pure silver solder wires 7 in the two solder holes 522;

[0062] S3. Put the cathode support seat 51 into the sleeve 1, rotate the cathode support seat 51 to make the two lead column holes I 511 parallel to the grooves 41 on the adjusting disc 4, and rotate the fixing screw 6 to lock the cathode support seat 51 with the front end of the fixing screw 6;

[0063] S4. Adjust the two filament lead columns 53 and the adjusting bolt 3 respectively, so that the bottom end of the filament lead column 53 is connected to the bottom surface in the groove 41.

[0064] S4.1. If the bottom end of the filament lead post 53 is completely fitted with the bottom surface of the groove 41 in step S3, proceed to the subsequent step;

[0065] S4.2. If the bottom end of the filament lead post 53 is not completely fitted with the bottom surface of the groove 41 in step S3, loosen the fixed screw 6 tightened in step S2, rotate the cathode support base 51 again until the bottom end of the filament lead post 53 is completely fitted with the bottom surface of the groove 41, then tighten the fixed screw 6 to lock the cathode support base 51 before proceeding to the subsequent step;

[0066] S5. Measure the height of the top surface of the filament lead post 53 and the top surface of the cathode support base 51, which is recorded as the measured height. Compare the measured height with the assembly accurate size. When the measured height does not match the assembly accurate size, adjust the adjusting bolt 3 until the measured height matches the assembly accurate size. Then lock the locking nut 2.

[0067] S6. Put the device completed in step S5 as a whole in a hydrogen furnace. Raise the temperature of the hydrogen furnace to 960℃ and keep it for 8 minutes. Then naturally cool it to room temperature.

[0068] S7. After completing step S6, loosen the fixed screw 6 and slowly take out the filament assembly 5 from the sleeve 1. The welding of the filament assembly 5 is completed.

[0069] Further, the pure silver solder wire 7 is DHLAg-2.

Claims

1. A welding method using an X-ray tube filament welding device, a filament assembly (5) comprising a cathode support seat (51), a filament insulating column (52), a filament lead column (53) and a filament (54), the cathode support seat (51) being provided with two lead column holes I (511); two insulating column holes (512) are arranged below the two lead column holes I (511), the inner diameter of the insulating column holes (512) is larger than that of the lead column holes I (511), the two insulating column holes (512) are coaxial with the two lead column holes I (511), the filament insulating column (52) is provided with two, the two filament insulating columns (52) are connected in the two insulating column holes (512) respectively, the X-ray tube filament welding device comprises a sleeve (1) and an adjusting bolt (3), the sleeve (1) comprises a side wall and a bottom plate, the bottom plate of the sleeve (1) is provided with a bottom screw hole (101), the adjusting bolt (3) is connected in the bottom screw hole (101), the filament insulating column (52) is provided with a lead column hole II (521) and a solder hole (522), the solder hole (522) is coaxially arranged at the lower end of the lead column hole II (521), the inner diameter of the solder hole (522) is larger than that of the lead column hole II (521), the solder hole (522) is coaxial with the lead column hole II (521), the two lead column holes II (521) are coaxial with the two lead column holes I (511) respectively, the filament lead column (53) is provided with two, the two filament lead columns (53) are connected in the two lead column holes I (511) respectively, the lower parts of the two filament lead columns (53) are connected in the two lead column holes II (521) respectively, the lower ends of the two filament lead columns (53) respectively extend out of the two lead column holes II (521), the filament (54) is connected between the two filament lead columns (53), the filament (54) is connected at the top end of the two filament lead columns (53), the solder hole (522) is connected with a pure silver solder wire (7), the top end of the adjusting bolt (3) is connected with an adjusting disc (4), the bottom ends of the two filament lead columns (53) are connected on the top surface of the adjusting disc (4), the top surface of the adjusting disc (4) is provided with a groove (41), the bottom ends of the two filament lead columns (53) are connected on the inner bottom surface of the groove (41) respectively, the bottom surface of the adjusting disc (4) is provided with a bottom groove (42), the top end of the adjusting bolt (3) is rotatably connected in the bottom groove (42), the adjusting bolt (3) is connected with a locking nut (2), the locking nut (2) is connected at the lower end of the bottom plate of the sleeve (1); the side wall of the sleeve (1) is provided with a side screw hole (102), the side screw hole (102) is threadedly connected with a fixing screw (6), the front end of the fixing screw (6) abuts against the side surface of the cathode support seat (51); characterized in that comprising the following steps: S1. Connect the locking nut (2) to the adjusting bolt (3), screw the adjusting bolt (3) into the bottom screw hole (101), do not tighten the locking nut (2) first, screw the fixing screw (6) into the side screw hole (102), do not make the front end of the fixing screw (6) extend out of the side wall of the sleeve (1) first. S2. Insert two filament lead posts (53) into lead post holes II (521) of two filament insulation posts (52) respectively, and place pure silver solder wires (7) in two solder holes (522); S3. Install the cathode support base (51) into the sleeve (1), rotate the cathode support base (51) to make the two lead post holes I (511) parallel to the grooves (41) on the adjusting disc (4), and then rotate the fixing screws (6) to lock the cathode support base (51) with the front ends of the fixing screws (6); S4. Adjust the two filament lead posts (53) and the adjusting bolts (3) respectively, so that the bottom ends of the filament lead posts (53) are connected to the bottom surface in the grooves (41); S4.

1. If the bottom ends of the filament lead posts (53) completely fit the bottom surface in the grooves (41) in step S3, proceed to the subsequent steps; S4.

2. If the bottom ends of the filament lead posts (53) do not completely fit the bottom surface in the grooves (41) in step S3, loosen the fixing screws (6) that are tightened in step S2, rotate the cathode support base (51) again until the bottom ends of the filament lead posts (53) completely fit the bottom surface in the grooves (41), and then tighten the fixing screws (6) to lock the cathode support base (51) before proceeding to the subsequent steps; S5. Measure the height of the top surface of the filament lead posts (53) and the top surface of the cathode support base (51), and record it as the measured height. Compare the measured height with the assembly accurate size. When the measured height does not match the assembly accurate size, adjust the adjusting bolts (3) until the measured height matches the assembly accurate size, and then lock the locking nuts (2); S6. Put the device completed in step S5 into a hydrogen furnace, raise the temperature of the hydrogen furnace to 960℃, and keep it for 8 minutes, and then naturally cool it to room temperature; S7. After completing step S6, loosen the fixing screws (6), and slowly take out the filament assembly (5) from the sleeve (1), and complete the welding of the filament assembly (5).

2. A method of welding using an X-ray tube filament welding apparatus as defined in claim 1, characterized in that: The pure silver solder wire (7) is DHLAg-2.

3. A method of welding using an X-ray tube filament welding apparatus as defined in claim 2, characterized in that: The sleeve (1) is provided with a plurality of side screw holes (102) on the side wall, the plurality of side screw holes (102) are circumferentially distributed around the center of the sleeve (1), each side screw hole (102) is connected with a fixing screw (6), and the front ends of the plurality of fixing screws (6) abut against the side surface of the cathode support base (51).

4. A method of welding using an X-ray tube filament welding apparatus as defined in claim 3, characterized in that: The sleeve (1), the adjusting disc (4), the adjusting bolt (3), and the locking nut (2) are coaxial.

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