A transport protection device for accelerating tube

Abstract

A transport protection device for an accelerating tube, the protection device is sleeved inside the accelerating tube and contacts with the anode tube at the top of the accelerating tube and the butterfly-shaped inner electrode inside the accelerating tube, comprising a base and an inner support structure, the inner support structure is vertically arranged relative to the base and the outer wall of the inner support structure is in contact with the butterfly-shaped inner electrode inside the accelerating tube, the bottom end of the inner support structure is fixedly connected to the base by arranging a first connecting piece, and the top end of the inner support structure is embedded in the anode tube at the top of the accelerating tube by arranging a second connecting piece to sleeve and fix the accelerating tube on the base. The present invention aims to solve the problem of large displacement of the butterfly-shaped inner electrode caused by bumps and vibrations during long-distance transportation of the accelerating tube, and keep the displacement of the butterfly-shaped inner electrode within an allowable range during transportation.

Description

Technical Field

[0001] The invention relates to the technical field of accelerators, and in particular to an accelerating tube transportation protection device. Background Art

[0002] As a civilian non-power nuclear technology application, electron accelerator radiation processing has been valued by most countries and has produced considerable economic and social benefits in some developed countries. It is widely used in polymer cross-linking modification, coating curing, polyethylene foaming, heat shrinkable materials, semiconductor modification, food sterilization and preservation, flue gas irradiation desulfurization and denitrification and other processing processes.

[0003] The accelerating tube in the electron accelerator is an electric vacuum component that can make electrons or ions form a bunch and accelerate them uniformly under a certain voltage. When in use, it needs to be under high vacuum conditions (10 －5 ~10 －6 Pa) to stably and reliably establish a uniform high-gradient DC accelerating electric field. The accelerating tube is composed of many sections of insulating rings (generally insulating materials are ceramics or glass) and multiple thin metal electrodes (external electrodes) stacked alternately. The insulating rings of the glass substrate and the metal electrodes are generally connected by organic adhesive bonding, and the insulating rings of the ceramic substrate and the metal electrodes are generally welded by metal-ceramic welding process.

[0004] In an accelerating tube that uses only an outer electrode, the axial potential distribution is extremely uneven. The electric field strength near the electrode is much greater than the average electric field strength of the entire accelerating tube, especially near the electron gun. In order to improve the withstand voltage level of the accelerating tube and change the extremely uneven state of the axial electric field distribution, an inner electrode is generally set between two adjacent insulating rings and connected to the outer electrode. The butterfly-shaped inner electrode is also called a double V-shaped inner electrode. The butterfly-shaped inner electrode has the function of improving the uniformity of the overall electric field of the accelerating tube, and can play a certain degree of shielding role, so that the divergent electrons will not bombard the inner wall of the insulating ring. By installing a butterfly-shaped inner electrode between two adjacent insulating rings, the accelerating tube can obtain a better uniform axial electric field distribution, improve the withstand voltage level of the accelerating tube, and avoid secondary electron emission, which causes internal discharge and affects the normal operation of the accelerating tube.

[0005] At present, the butterfly inner electrode is fixed on the outer electrode by screwing in a buckle. When the accelerating tube is transported over long distances, the bumpy road causes the butterfly inner electrode and the outer electrode to shift significantly, affecting the use of the accelerating tube. In view of this, it is necessary to provide an accelerating tube transportation protection device to avoid a large displacement of the butterfly inner electrode and the outer electrode and control the displacement of the butterfly inner electrode within an allowable range. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide an accelerating tube transportation protection device, which aims to solve the problem of large displacement of the butterfly inner electrode caused by bumps and vibrations during long-distance transportation of the accelerating tube, and keep the displacement of the butterfly inner electrode within an allowable range during transportation.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A transport protection device for an accelerating tube, wherein the protection device is sleeved inside the accelerating tube and contacts with an anode suction cylinder at the top of the accelerating tube and a butterfly-shaped inner electrode inside the accelerating tube, and comprises a base and an inner support structure, wherein the inner support structure is vertically arranged relative to the base and the outer side wall of the inner support structure abuts against the butterfly-shaped inner electrode inside the accelerating tube, wherein the bottom end of the inner support structure is fixedly connected to the base by arranging a first connecting piece, and the top end of the inner support structure is embedded in the anode suction cylinder at the top of the accelerating tube by arranging a second connecting piece so as to sleeve and fix the accelerating tube on the base.

[0009] Preferably, the inner support structure includes an inner support rod and an inner support sleeve, the inner support sleeve is sleeved on the outside of the inner support rod, and inner support auxiliary plates are respectively provided inside the inner support sleeve at the positions of the two ends of the inner support rod.

[0010] Preferably, the length of the inner support sleeve is greater than the length of the inner support rod, the top surface or bottom surface of the inner support auxiliary plate abuts against the bottom surface or top surface of the inner support rod, the side surface of the inner support auxiliary plate abuts against the inner wall of the inner support sleeve, and the space from the inner support auxiliary plate to the inner support sleeve constitutes a connecting chamber for inserting the first connecting member and the second connecting member.

[0011] Preferably, the inner support rod is made of organic glass or polyvinyl chloride.

[0012] Preferably, the first connecting member is a columnar member, the top of which is embedded in the connecting chamber at the bottom of the inner support sleeve, and the bottom of which is threadedly connected to the base via a fastening screw; the second connecting member is a boss component, the bottom of which is embedded in the connecting chamber at the top of the inner support sleeve, and the top of which is embedded in the pole suction cylinder at the top of the accelerating tube.

[0013] Preferably, a through hole is opened in the center of the columnar member along its axial direction, and the inner diameter of the through hole is the same as the inner diameter of the anode tube at the top of the accelerating tube.

[0014] Preferably, the columnar member, the boss member and the connecting chamber are in interference fit, and glue is coated on portions of the outer side walls of the columnar member and the boss member embedded in the connecting chamber.

[0015] Preferably, a PVC elastic pad is adhered between the bottom of the columnar member and the base.

[0016] Preferably, a transverse connecting hole is provided at a position of the bottom of the columnar member close to the base and on the convex portion of the boss member, and the axis of the transverse connecting hole is perpendicular to the axis of the inner support sleeve.

[0017] Preferably, the distance from the central axis of the transverse connecting hole on the columnar member to the bottom of the columnar member is H, and the distance from the central axis of the transverse connecting hole on the boss member to the table surface of the boss member is h, and H=h.

[0018] Compared with the prior art, the present invention provides an accelerating tube transportation protection device, in which the accelerating tube is sleeved on the protection device, the bottom of the accelerating tube is fitted with the base of the protection device, and the internal support structure in the protection device is embedded in the accelerating tube and abuts against the multiple butterfly-shaped inner electrodes in the accelerating tube, providing radial support for the multiple butterfly-shaped inner electrodes, so as to ensure the coaxiality of the multiple butterfly-shaped inner electrodes arranged up and down, that is, to ensure that each butterfly-shaped inner electrode and its corresponding outer electrode will not be greatly displaced due to bumps and vibrations during the long-distance transportation of the accelerating tube. The boss component on the internal support structure is embedded in the electrode suction cylinder at the top of the accelerating tube, and cooperates with the base to provide axial fixing for the accelerating tube. The first connecting member and the second connecting member in the present protection device are also provided with corresponding transverse connecting holes, which facilitates the stacking and fixing of multiple internal support structures, so that multiple accelerating tubes can be stacked and fixed and protected, thereby improving transportation efficiency and reducing transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of an accelerating tube transportation protection device provided by the present invention;

[0021] Figure 2 A schematic diagram of the structure of an accelerating tube transportation protection device provided by the present invention after being sleeved with an accelerating tube;

[0022] Figure 3 A schematic diagram of the structure of an accelerating tube transport protection device provided by the present invention when the inner support structure abuts against the butterfly-shaped inner electrode;

[0023] Figure 4 It is a schematic diagram of the structure where two inner support structures are superimposed;

[0024] Figure 5 The present invention is a schematic structural diagram of an accelerating tube transport protection device provided by the present invention and two sections of accelerating tubes after being sleeved together.

[0025] Reference numerals and component descriptions in the drawings:

[0026] 1. Electrode suction cylinder; 2. Butterfly-shaped inner electrode; 3. Base; 4. Inner support rod; 5. Inner support sleeve; 6. Inner support auxiliary plate; 7. Columnar part; 8. Fastening screw; 9. Boss component; 10. Through hole; 11. Horizontal connecting hole; 12. Connecting screw; 13. Outer electrode; 14. Insulating ring; 15. PVC elastic pad. DETAILED DESCRIPTION

[0027] At present, the butterfly-shaped inner electrode is fixed on the outer electrode by screwing in a buckle. When the accelerating tube is transported over a long distance, the bumpy road causes a large displacement of the butterfly-shaped inner electrode and the outer electrode, which affects the use of the accelerating tube. In view of this, the present invention provides an accelerating tube transportation protection device to prevent a large displacement of the butterfly-shaped inner electrode and the outer electrode, and control the displacement of the butterfly-shaped inner electrode within an allowable range.

[0028] The technical solution of the present invention will be clearly and completely described below through specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1 to Figure 3 As shown, a transport protection device for an accelerating tube is sleeved inside the accelerating tube and contacts with an anode tube 1 at the top of the accelerating tube and a butterfly-shaped inner electrode 2 inside the accelerating tube.

[0030] The protection device includes a base 3 and an inner support structure, wherein the inner support structure is vertically arranged relative to the base 3 and the outer wall of the inner support structure abuts against the butterfly-shaped inner electrode 2 inside the accelerating tube, thus providing radial support for the butterfly-shaped inner electrode 2. The bottom end of the inner support structure is fixedly connected to the base 3 by arranging a first connecting member, and the top end of the inner support structure is embedded in the electrode suction cylinder 1 at the top end of the accelerating tube by arranging a second connecting member to sleeve and fix the accelerating tube on the base 3, thus providing axial fixation for the entire accelerating tube.

[0031] Among them, the inner support structure includes an inner support rod 4 and an inner support sleeve 5, and the inner support rod 4 can be made of organic glass or polyvinyl chloride. The inner support sleeve 5 can be a PVC elastic sleeve, which provides radial support for each butterfly-shaped inner electrode 2 on the one hand, and ensures the coaxiality of multiple butterfly-shaped inner electrodes 2 arranged up and down on the other hand. The inner support sleeve 5 is sleeved on the outside of the inner support rod 4, and the inner support sleeve 5 is provided with inner support auxiliary plates 6 at the positions at both ends of the inner support rod 4. The length of the inner support sleeve 5 is greater than the length of the inner support rod 4, the top surface or bottom surface of the inner support auxiliary plate 6 abuts against the bottom surface or top surface of the inner support rod 4, the side surface of the inner support auxiliary plate 6 abuts against the inner side wall of the inner support sleeve 5, and the space from the inner support auxiliary plate 6 to the inner support sleeve 5 constitutes a connecting chamber for the first connecting member and the second connecting member to be placed.

[0032] In order to improve the connection effect, the first connecting member is set as a columnar member 7, the top of the columnar member 7 is embedded in the connection chamber located at the bottom of the inner support sleeve 5, and the bottom of the columnar member 7 is threadedly connected to the base 3 by a fastening screw 8. In order to filter the axial impact caused by bumps and prevent the inner support structure and the butterfly-shaped inner electrode 2 from axially rubbing during transportation, it is preferred that a PVC elastic pad 15 is pasted between the bottom of the columnar member 7 and the base 3. The second connecting member is set as a boss member 9, the bottom of the boss member 9 is embedded in the connection chamber located at the top of the inner support sleeve 5, and the top of the boss member 9 is embedded in the electrode suction cylinder 1 at the top of the accelerating tube. The columnar member 7, the boss member 9 and the connection chamber are interference fit, and the outer side walls of the columnar member 7 and the boss member 9 embedded in the connection chamber are coated with glue and bonded to the inner side walls of the connection chamber to further improve the connection effect between the columnar member 7, the boss member 9 and the inner support sleeve 5.

[0033] A through hole 10 is provided in the center of the columnar member 7 along its axial direction. The inner diameter of the through hole 10 is the same as the inner diameter of the anode tube 1 at the top of the accelerating tube, that is, it corresponds to the shape of the convex part of the boss member 9, so that multiple inner support structures can be stacked later to protect multiple sections of accelerating tubes. A transverse connecting hole 11 is provided at the bottom of the columnar member 7 near the base 3 and on the convex part of the boss member 9. The axis of the transverse connecting hole 11 is perpendicular to the axis of the inner support sleeve 5.

[0034] The distance from the central axis of the transverse connecting hole 11 on the columnar member 7 to the bottom of the columnar member 7 is H, and the distance from the central axis of the transverse connecting hole 11 on the boss member 9 to the table surface of the boss member 9 is h, and the two have the following relationship: H = h. When two adjacent inner support structures are superimposed on each other, the convex part of the boss member 9 is embedded in the through hole 10 of the columnar member 7, and the two transverse connecting holes 11 are correspondingly penetrated and fastened and connected by connecting screws 12 through the two transverse connecting holes 11, thereby fixing and connecting two adjacent inner support structures to adapt to the sleeve connection of multi-stage accelerating tubes.

[0035] See also Figure 4-5As shown, the present protection device is applied to the transportation protection of two sections of accelerating tubes. The inner support structure at the lower end is fixedly connected to the base 3 through the columnar member 7, and then a section of the inner support structure is superimposed on the inner support structure that has been fixed to the base 3. That is, the columnar member 7 at the lower end of the inner support sleeve 5 at the upper end is sleeved onto the boss member 9 at the upper end of the inner support sleeve 5 at the lower end, and the inner support structures at both ends are fastened and connected with connecting screws 12. Thereafter, the accelerating tubes at both ends are sleeved in the protection device in sequence, so that the butterfly-shaped inner electrode 2 in the accelerating tube abuts against the outer wall of the inner support sleeve 5 in the inner support structure, and the boss member 9 in the inner support structure at the upper end is embedded in the electrode suction tube 1 of the accelerating tube superimposed on the upper end, so that the two sections of accelerating tubes are fixed in the present protection device.

[0036] If multiple inner support structures are connected through the columnar member 7, the boss member 9 and the connecting screws 12, the multiple sections of the accelerating tube can be fixed and protected according to the above-mentioned assembly method of the accelerating tube and the protective device.

[0037] The accelerating tube is sleeved on the transportation protection device provided by the present invention, the bottom of the accelerating tube is fitted with the base 3 of the protection device, the inner support structure of the protection device is embedded in the accelerating tube and abuts against the multiple butterfly-shaped inner electrodes 2 in the accelerating tube, providing radial support for the butterfly-shaped inner electrodes 2, so as to ensure that the butterfly-shaped inner electrodes 2 and the outer electrodes 13 are kept in a clamping state, and to prevent the accelerating tube from being greatly displaced relative to the outer electrodes 13 due to bumps and vibrations during long-distance transportation. The boss member 9 on the inner support structure is embedded in the electrode suction cylinder 1 at the top of the accelerating tube, and cooperates with the base 3 to provide axial fixing for the accelerating tube.

[0038] The columnar member 7 and the boss member 9 in the protection device are also provided with corresponding transverse connection holes 11 to facilitate the stacking and fixing of multiple inner support structures, so that multiple accelerating tubes can be stacked and fixed for protection, thereby improving transportation efficiency and reducing transportation costs.

[0039] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transport protection device for an accelerating tube, wherein the protection device is sleeved inside the accelerating tube and contacts the electrode suction cylinder at the top of the accelerating tube and the butterfly-shaped inner electrode inside the accelerating tube, and is characterized in that: The device comprises a base and an inner support structure, wherein the inner support structure is vertically arranged relative to the base and the outer side wall of the inner support structure abuts against the butterfly-shaped inner electrode inside the accelerating tube, the bottom end of the inner support structure is fixedly connected to the base by arranging a first connecting piece, and the top end of the inner support structure is embedded in the electrode suction cylinder at the top end of the accelerating tube by arranging a second connecting piece so as to sleeve and fix the accelerating tube on the base; The inner support structure includes an inner support rod and an inner support sleeve, wherein the inner support sleeve is sleeved on the outside of the inner support rod and inner support auxiliary plates are respectively arranged inside the inner support sleeve at the positions of the two ends of the inner support rod; The length of the inner support sleeve is greater than the length of the inner support rod, the top surface or bottom surface of the inner support auxiliary plate abuts against the bottom surface or top surface of the inner support rod, the side surface of the inner support auxiliary plate abuts against the inner side wall of the inner support sleeve, and the space from the inner support auxiliary plate to the inner support sleeve constitutes a connecting chamber for inserting the first connecting member and the second connecting member; The first connecting member is a columnar member, the top of which is embedded in the connecting chamber at the bottom of the inner support sleeve, and the bottom of which is threadedly connected to the base via a fastening screw; the second connecting member is a boss member, the bottom of which is embedded in the connecting chamber at the top of the inner support sleeve, and the top of which is embedded in the anode tube at the top of the accelerating tube; A through hole is formed in the center of the column along its axial direction, and the inner diameter of the through hole is the same as the inner diameter of the anode tube at the top of the accelerating tube; A transverse connecting hole is provided at a position of the bottom of the columnar member close to the base and on the convex portion of the boss member. The axis of the transverse connecting hole is perpendicular to the axis of the inner support sleeve.

2. The accelerating tube transport protection device according to claim 1, characterized in that: The inner support rod is made of organic glass or polyvinyl chloride.

3. The accelerating tube transport protection device according to claim 1, characterized in that: The columnar component, the boss component and the connecting chamber are in interference fit, and glue is coated on the outer side walls of the columnar component and the boss component embedded in the connecting chamber.

4. The accelerating tube transport protection device according to claim 1, characterized in that: A PVC elastic pad is also pasted between the bottom of the columnar member and the base.

5. The accelerating tube transport protection device according to claim 1, characterized in that: The distance from the central axis of the transverse connecting hole on the columnar member to the bottom of the columnar member is H, and the distance from the central axis of the transverse connecting hole on the boss member to the table surface of the boss member is h, H=h.

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