Accelerating tube adjusting device
By designing the acceleration tube adjustment device, using components such as fixed rings, plane adjustment rings, verticality adjustment brackets, etc., the precise adjustment of the acceleration tube position is achieved, and the problems of insufficient adjustment and mechanical interference in the prior art are solved.
Patent Information
- Application Number
- CN202421469168.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-06-25
AI Technical Summary
In existing radiation therapy equipment, the adjustment of the acceleration tube is not accurate enough, and due to mechanical interference, it is inconvenient to adjust.
An acceleration tube adjustment device is designed, including a fixed ring, a plane adjustment ring, a verticality adjustment bracket, a plane adjustment assembly and a verticality adjustment assembly. With the fit of these components, the position of the accelerator tube can be precisely adjusted in horizontal and vertical directions.
The precise adjustment of the accelerator tube position is achieved, the problem of mechanical interference is overcome, and the adjustment operation is more convenient and accurate.
Smart Images
Figure CN222871185U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of radiotherapy, and in particular to an accelerating tube adjusting device. Background Art
[0002] The accelerator tube is an extremely important component in radiotherapy equipment and requires precise adjustment of the isocenter point. In existing radiotherapy equipment, the adjustment of the accelerator tube is often not precise enough and is inconvenient due to mechanical interference. Utility Model Content
[0003] In view of this, the utility model provides an accelerating tube adjusting device, so as to adjust the accelerating tube.
[0004] The technical solution of the utility model is specifically achieved as follows:
[0005] An accelerating tube adjusting device, comprising: a fixing ring, a plane adjusting ring, a verticality adjusting bracket, a plane adjusting component and a verticality adjusting component;
[0006] The fixing ring is arranged on the accelerating tube mounting plate of the frame of the radiotherapy equipment, and a receiving cavity is arranged in the middle of the fixing ring;
[0007] The plane adjustment ring is arranged in the accommodating cavity of the fixing ring; a connecting hole is arranged on the top of the plane adjustment ring;
[0008] The fixing ring is provided with at least two sets of plane adjustment components whose axes are perpendicular to each other;
[0009] Each set of plane adjustment components includes two plane adjusters arranged opposite to each other; the plane adjusters are arranged on the fixing ring, one end of which abuts against the outer side of the plane adjustment ring, and is used to adjust the position of the plane adjustment ring in the horizontal direction;
[0010] The verticality adjustment bracket is arranged on the top of the plane adjustment ring; a mounting cavity is arranged in the middle of the verticality adjustment bracket for fixing and mounting the accelerating tube;
[0011] At least three verticality adjustment components are arranged on the verticality adjustment bracket; at least three verticality adjustment components are evenly distributed around the central axis of the plane adjustment ring; the verticality adjustment component is passed through the verticality adjustment bracket, and its bottom is connected to the connecting hole at the top of the plane adjustment ring, so as to adjust the position of the verticality adjustment bracket in the vertical direction.
[0012] Preferably, a plurality of through holes are provided on the side wall of the fixing ring; and internal threads are provided in the through holes;
[0013] Each group of plane adjustment components includes a first plane adjuster and a second plane adjuster that are arranged opposite to each other;
[0014] The first plane adjuster comprises: a horizontal adjustment bolt; the horizontal adjustment bolt is passed through and screwed into a through hole on the fixing ring, and the bottom end of the horizontal adjustment bolt abuts against the outer side of the plane adjustment ring;
[0015] The second plane adjuster includes: a sleeve and a compression spring; the sleeve is inserted into and screwed into the through hole on the fixing ring; a hollow cavity is arranged at the bottom end of the sleeve; the top end of the compression spring is arranged in the cavity at the bottom end of the sleeve, and the bottom end abuts against the outer side of the plane adjustment ring.
[0016] Preferably, the verticality adjustment bracket is provided with at least three arms, and the at least three arms are connected to the at least three verticality adjustment components in a one-to-one correspondence; each arm is provided with a through hole, and the through hole is provided with an internal thread;
[0017] The verticality adjustment assembly comprises: a vertical adjustment bolt, a fastening bolt, a butterfly spring, a first gasket group and a second gasket group;
[0018] The bottom of the vertical adjustment bolt is screwed into the through hole of the corresponding support arm, and the middle of the vertical adjustment bolt is provided with a central hole with internal threads;
[0019] The fastening bolt is inserted into the center hole of the vertical adjustment bolt, and there is a clearance fit between the fastening bolt and the center hole. The bottom end of the fastening bolt passes through the through hole on the verticality adjustment bracket and is screwed to the connecting hole on the plane adjustment ring.
[0020] The butterfly spring is inserted into the vertical adjustment bolt and is located between the head of the vertical adjustment bolt and the verticality adjustment bracket;
[0021] The first gasket set includes: a first gasket and a second gasket; the mating surfaces of the first gasket and the second gasket are curved surfaces; the first gasket and the second gasket are both inserted into the fastening bolt and arranged between the head of the fastening bolt and the head of the vertical adjustment bolt;
[0022] The second gasket group includes: a third gasket and a fourth gasket; the matching surfaces of the third gasket and the fourth gasket are curved surfaces; the third gasket and the fourth gasket are both inserted into the fastening bolt and arranged between the bottom of the vertical adjustment bolt and the plane adjustment ring.
[0023] Preferably, the bottom of the first gasket is a convex curved surface, and the top of the second gasket is a concave curved surface corresponding to the convex curved surface;
[0024] The bottom of the third gasket is a convex curved surface, and the top of the fourth gasket is a concave curved surface corresponding to the convex curved surface.
[0025] Preferably, the horizontal adjustment bolt is a fine-thread bolt.
[0026] Preferably, the pitch of the horizontal adjustment bolt is 0.75 mm.
[0027] As can be seen from the above, in the accelerating tube adjustment device of the present invention, since at least two groups of vertically arranged plane adjustment components are provided, and the second plane adjuster in each group of plane adjustment components is provided with a second horizontal adjustment bolt, a sleeve and a compression spring, the position of the plane adjustment ring in the horizontal direction can be adjusted by adjusting the four plane adjusters, so that the position of the accelerating tube in the horizontal direction can be adjusted; at the same time, at least three verticality adjustment components are also provided in the accelerating tube adjustment device, so the position of the verticality adjustment bracket in the vertical direction can be adjusted by adjusting the verticality adjustment components, so that the position of the accelerating tube in the vertical direction can be adjusted, thereby realizing the precise adjustment of the position of the accelerating tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the accelerating tube adjustment device in the embodiment of the utility model.
[0029] Figure 2 It is a schematic structural diagram of the accelerating tube adjusting device in the embodiment of the utility model.
[0030] Figure 3 It is a schematic top view of the plane adjustment assembly in the embodiment of the utility model.
[0031] Figure 4 It is a schematic diagram of a first plane adjuster in an embodiment of the utility model.
[0032] Figure 5 It is a schematic diagram of a second plane adjuster in an embodiment of the utility model.
[0033] Figure 6 It is a structural schematic diagram of the verticality adjustment component in the embodiment of the utility model. DETAILED DESCRIPTION
[0034] In order to make the technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0035] Figure 1 FIG. 1 is a schematic diagram of the structure of the accelerating tube adjusting device in the embodiment of the utility model. Figure 1As shown, the accelerating tube adjustment device in the embodiment of the utility model comprises: a fixing ring 11, a plane adjustment ring 12, a verticality adjustment bracket 13, a plane adjustment component 14 and a verticality adjustment component 15;
[0036] The fixing ring 11 is arranged on the accelerating tube mounting plate 10 of the frame of the radiotherapy equipment, and a receiving cavity is arranged in the middle of the fixing ring 11;
[0037] The plane adjustment ring 12 is arranged in the accommodating cavity of the fixing ring 11; a connecting hole is arranged on the top of the plane adjustment ring 12;
[0038] The fixing ring 11 is provided with at least two sets of plane adjustment components 14 whose axes are perpendicular to each other;
[0039] Each plane adjustment assembly 14 includes two plane adjusters arranged opposite to each other; the plane adjuster is inserted into the fixing ring 11, and one end of the plane adjuster abuts against the outer side of the plane adjustment ring 12, so as to adjust the position of the plane adjustment ring 12 in the horizontal direction;
[0040] The verticality adjustment bracket 13 is arranged on the top of the plane adjustment ring 12; a mounting cavity 131 is arranged in the middle of the verticality adjustment bracket 13 for fixing and mounting the accelerating tube 20;
[0041] At least three verticality adjustment components 15 are arranged on the verticality adjustment bracket 13; at least three verticality adjustment components 15 are evenly distributed around the central axis of the plane adjustment ring 12; the verticality adjustment component 15 is passed through the verticality adjustment bracket 13, and its bottom is connected to the connecting hole at the top of the plane adjustment ring 12, so as to adjust the position of the verticality adjustment bracket 13 in the vertical direction.
[0042] In the technical solution of the present application, since a plane adjustment ring and at least two groups of plane adjustment components are provided in the above-mentioned accelerating tube adjustment device, and the two groups of plane adjustment components are vertically arranged (that is, the axes of the two groups of plane adjustment components are perpendicular to each other; for example, the axes of the first group of plane adjustment components can be along the X-axis direction in the spatial coordinate system, and the axes of the second group of plane adjustment components can be along the Y-axis direction in the spatial coordinate system), each group of plane adjustment components also includes two plane adjusters arranged opposite to each other. Therefore, the position of the plane adjustment ring in a first horizontal direction (for example, the X-axis direction in the spatial coordinate system) can be adjusted by two plane adjusters in one group of plane adjustment components, and the position of the plane adjustment ring in a second horizontal direction perpendicular to the first horizontal direction (for example, the Y-axis direction in the spatial coordinate system) can be adjusted by two plane adjusters in another group of plane adjustment components. Therefore, the position of the plane adjustment ring in the horizontal direction can be adjusted by the above-mentioned plane adjustment components, so that the position of the accelerating tube in the horizontal direction can be accurately adjusted. In addition, since a verticality adjustment bracket and at least three verticality adjustment components are also provided in the above-mentioned accelerating tube adjustment device, the position of the verticality adjustment bracket in the vertical direction can also be adjusted by the verticality adjustment components, so that the position of the accelerating tube in the vertical direction can be accurately adjusted, thereby realizing accurate adjustment of the position of the accelerating tube.
[0043] In addition, in the technical solution of the present application, the accelerating tube adjustment device can be implemented in a variety of specific implementations. The following will take several specific implementations as examples to introduce the technical solution of the present application in detail.
[0044] For example, as an example, in a preferred specific embodiment of the present application, a plurality of through holes are provided on the side wall of the fixing ring; and internal threads are provided in the through holes;
[0045] Each set of plane adjustment components 14 includes a first plane adjuster 141 and a second plane adjuster 142 which are arranged opposite to each other;
[0046] The first plane adjuster comprises: a horizontal adjustment bolt; the horizontal adjustment bolt is passed through and screwed into a through hole on the fixing ring, and the bottom end of the horizontal adjustment bolt abuts against the outer side of the plane adjustment ring;
[0047] The second plane adjuster includes: a sleeve 21 and a compression spring 22; the sleeve is inserted into and screwed into the through hole on the fixing ring; a hollow cavity is provided at the bottom end of the sleeve; the top end of the compression spring is provided in the cavity at the bottom end of the sleeve, and the bottom end abuts against the outer side of the plane adjustment ring.
[0048] When using the above-mentioned plane adjustment assembly, the horizontal adjustment bolt in the first plane adjuster can be inserted and screwed into the through hole on the fixing ring on one side of the fixing ring, and the sleeve in the second plane adjuster can be inserted and screwed into the through hole on the fixing ring on the other side of the fixing ring (i.e., the opposite side of the horizontal adjustment bolt), and then the sleeve is rotated so that the bottom end of the compression spring in the second plane adjuster is pressed against the outer side of the plane adjustment ring and a certain pressure is maintained on the plane adjustment ring. Therefore, when it is necessary to adjust the horizontal position of the plane adjustment ring, the horizontal adjustment bolt can be rotated in the first direction so that the bottom end of the horizontal adjustment bolt pushes the plane adjustment ring to move toward one side of the second plane adjuster. At this time, the compression spring in the second plane adjuster will be compressed, thereby applying corresponding pressure to the plane adjustment ring. In addition, the horizontal adjustment bolt can also be rotated in the second direction (the opposite direction to the first direction); at this time, the plane adjustment ring will move to one side of the horizontal adjustment bolt under the pressure of the compression spring. Similarly, after the bottom end of the horizontal adjustment bolt is in contact with the plane adjustment ring, the sleeve can be rotated in the first direction or the second direction to change the pressure of the compression spring in the sleeve on the plane adjustment ring, thereby pushing the plane adjustment ring to move to one side of the horizontal adjustment bolt or to one side of the second plane adjuster. Therefore, through the above-mentioned set of plane adjustment components, the horizontal position of the plane adjustment ring can be adjusted in a horizontal direction.
[0049] Since at least two groups of vertically arranged plane adjustment components are provided in the accelerating tube adjustment device of the present application, and each group of plane adjustment components is provided with two plane adjusters, the position of the plane adjustment ring in the horizontal direction can be adjusted by adjusting the four plane adjusters, thereby adjusting the position of the accelerating tube in the horizontal direction.
[0050] Moreover, when there is interference from the rack or accelerating tube (e.g. Figure 1 When the plane adjuster on the left side of the machine has certain interference with the frame or the accelerating tube, and the plane adjuster is inconvenient to operate, the plane adjuster on the opposite side without interference with the frame or the accelerating tube can be directly adjusted, and the accelerating tube can be adjusted back by the elastic force of the compression spring, thereby overcoming the problem of mechanical interference and making the adjustment operation more convenient. At the same time, since the compression spring is always kept in a compressed state during the adjustment process, the horizontal adjustment bolt can always be pressed on the plane adjustment ring, making the adjustment accuracy of the horizontal adjustment bolt more accurate.
[0051] In addition, as an example, in a preferred specific embodiment of the present application, the horizontal adjustment bolt can be a fine-thread bolt with a pitch of 0.75 millimeters (mm), so as to meet the needs of fine-tuning and improve the adjustment accuracy.
[0052] In addition, as an example, Figure 6In a preferred specific embodiment of the present application, at least three arms are provided on the vertical adjustment bracket 13, and at least three arms are connected to at least three vertical adjustment components in a one-to-one correspondence; each arm is provided with a through hole, and an internal thread is provided in the through hole;
[0053] The verticality adjustment assembly 15 includes: a vertical adjustment bolt 51, a fastening bolt 52, a butterfly spring 53, a first gasket group 54 and a second gasket group 55;
[0054] The bottom of the vertical adjustment bolt 51 is screwed into the through hole on the corresponding arm of the vertical adjustment bracket 13, and the middle of the vertical adjustment bolt 51 is provided with a central hole with internal threads;
[0055] The fastening bolt 52 is inserted into the center hole of the vertical adjustment bolt 51, and there is a clearance fit between the fastening bolt 52 and the center hole (that is, the diameter of the fastening bolt is smaller than the diameter of the center hole, so that there is a certain gap between the fastening bolt and the center hole), and the bottom end of the fastening bolt 52 passes through the through hole on the verticality adjustment bracket 13 and is screwed to the connecting hole on the plane adjustment ring 12;
[0056] The butterfly spring 53 is inserted into the vertical adjustment bolt 51 and is located between the head of the vertical adjustment bolt 51 and the verticality adjustment bracket 13;
[0057] The first gasket set 54 includes: a first gasket 541 and a second gasket 542; the mating surfaces of the first gasket and the second gasket are curved surfaces; the first gasket and the second gasket are both inserted into the fastening bolt 52 and arranged between the head of the fastening bolt 52 and the head 13 of the vertical adjustment bolt 51;
[0058] The second gasket group 55 includes: a third gasket 551 and a fourth gasket 552; the mating surfaces of the third gasket and the fourth gasket are curved surfaces; the third gasket and the fourth gasket are both inserted into the fastening bolt 52 and arranged between the bottom of the vertical adjustment bolt 51 and the plane adjustment ring 12, that is, the fastening bolt 52 squeezes the vertical adjustment bolt 51 onto the plane adjustment ring 12 through two groups of gasket groups.
[0059] In the vertical adjustment assembly, the bottom of the vertical adjustment bolt 51 is screwed on the corresponding arm of the vertical adjustment bracket 13, and a butterfly spring 53 is arranged between the head of the vertical adjustment bolt 51 and the vertical adjustment bracket 13, so that the threaded connection between the vertical adjustment bolt 51 and the vertical adjustment bracket 13 can be guaranteed to have a certain pre-tightening force, and the threads will not loosen, so as to achieve a reliable connection between the vertical adjustment bolt 51 and the vertical adjustment bracket 13, and also make the adjustment of the vertical adjustment bolt 51 more precise. In addition, the fastening bolt 52 passes through the center hole of the vertical adjustment bolt 51, and there is a clearance fit between the center hole, and the bottom end of the fastening bolt 52 is screwed on the plane adjustment ring 12, so that the vertical adjustment bolt 51 and the plane adjustment ring 12 can be pressed together. Therefore, when the vertical adjustment assembly is used to adjust the vertical position of the accelerating tube, the height of the three arms of the vertical adjustment bracket can be adjusted by screwing in or out the vertical adjustment bolt, so as to adjust the vertical position of the accelerating tube. For example, the other two groups of vertical adjustment assemblies are kept stationary, and the vertical adjustment bolts of another group are adjusted. Figure 6 Take for example. Slightly loosen the fastening bolt 52 so that the vertical adjustment bolt 51 is no longer subjected to too much squeezing force and can be turned. At this time, as the vertical adjustment bolt 51 is turned, since the vertical adjustment bolt 51 cannot be raised or lowered, it can only drive the corresponding arm of the vertical adjustment bracket 13 up and down, thereby driving the central acceleration tube to shift accordingly, thereby adjusting the verticality of the acceleration tube. Moreover, since there is a gap between the vertical adjustment bolt 51 and the fastening bolt 52, and the upper and lower gasket groups are curved surface fits, the inclination of the arm, in turn, drives the vertical adjustment bolt 51 to tilt, so that the entire structure is balanced again. After the adjustment is in place, tighten the fastening bolt 52 so that the vertical adjustment bolt 51 can no longer move, and the adjustment is complete.
[0060] In addition, since two shim groups are provided, and each shim group includes two shims, and the mating surfaces of the two shims are curved surfaces, when adjusting through the vertical adjustment bolt, the curved surfaces between the two shims in the two shim groups will slide relative to each other, playing a certain adjustment role. For example, the first shim group 54 provided between the head of the fastening bolt 52 and the head 13 of the vertical adjustment bolt 51 can ensure reliable contact between the fastening bolt 52 and the vertical adjustment bolt 51 at different angles; the second shim group 55 provided between the bottom of the vertical adjustment bolt 51 and the plane adjustment ring 12 can ensure that no movement occurs after the vertical adjustment bracket is adjusted.
[0061] When the vertical adjustment bolt is adjusted into place, tighten the fastening bolt to complete the entire adjustment process and adjust the verticality adjustment bracket into place.
[0062] In addition, as an example, in a preferred specific embodiment of the present application, the bottom of the first gasket 541 is a convex curved surface, and the top of the second gasket 542 is a concave curved surface corresponding to the convex curved surface;
[0063] The bottom of the third gasket 551 is a convex surface, and the top of the fourth gasket 552 is a concave surface corresponding to the convex surface.
[0064] Through the corresponding convex curved surface and concave curved surface, relative sliding can be generated between the curved surfaces of the two gaskets, thereby playing a certain regulating role.
[0065] In summary, in the technical solution of the present application, since at least two groups of vertically arranged plane adjustment components are provided in the accelerating tube adjustment device, and the second plane adjuster in each group of plane adjustment components is provided with a second horizontal adjustment bolt, a sleeve and a compression spring, the position of the plane adjustment ring in the horizontal direction can be adjusted by adjusting the four plane adjusters, so that the position of the accelerating tube in the horizontal direction can be adjusted; at the same time, at least three verticality adjustment components are also provided in the accelerating tube adjustment device, so the position of the verticality adjustment bracket in the vertical direction can be adjusted by adjusting the verticality adjustment components, so that the position of the accelerating tube in the vertical direction can be adjusted, thereby realizing the precise adjustment of the position of the accelerating tube.
[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.
Claims
1. An accelerating tube adjustment device, characterized in that: The accelerating tube adjustment device comprises: a fixing ring, a plane adjustment ring, a verticality adjustment bracket, a plane adjustment component and a verticality adjustment component; The fixing ring is arranged on the accelerating tube mounting plate of the frame of the radiotherapy equipment, and a receiving cavity is arranged in the middle of the fixing ring; The plane adjustment ring is arranged in the accommodating cavity of the fixing ring; a connecting hole is arranged on the top of the plane adjustment ring; The fixing ring is provided with at least two sets of plane adjustment components whose axes are perpendicular to each other; Each set of plane adjustment components includes two plane adjusters arranged opposite to each other; the plane adjusters are arranged on the fixing ring, one end of which abuts against the outer side of the plane adjustment ring, and is used to adjust the position of the plane adjustment ring in the horizontal direction; The verticality adjustment bracket is arranged on the top of the plane adjustment ring; a mounting cavity is arranged in the middle of the verticality adjustment bracket for fixing and mounting the accelerating tube; At least three verticality adjustment components are arranged on the verticality adjustment bracket; at least three verticality adjustment components are evenly distributed around the central axis of the plane adjustment ring; the verticality adjustment component is passed through the verticality adjustment bracket, and its bottom is connected to the connecting hole at the top of the plane adjustment ring, so as to adjust the position of the verticality adjustment bracket in the vertical direction.
2. The accelerating tube adjustment device according to claim 1, characterized in that: A plurality of through holes are arranged on the side wall of the fixing ring; and internal threads are arranged in the through holes; Each group of plane adjustment components includes a first plane adjuster and a second plane adjuster that are arranged opposite to each other; The first plane adjuster comprises: a horizontal adjustment bolt; the horizontal adjustment bolt is passed through and screwed into a through hole on the fixing ring, and the bottom end of the horizontal adjustment bolt abuts against the outer side of the plane adjustment ring; The second plane adjuster includes: a sleeve and a compression spring; the sleeve is inserted into and screwed into the through hole on the fixing ring; a hollow cavity is arranged at the bottom end of the sleeve; the top end of the compression spring is arranged in the cavity at the bottom end of the sleeve, and the bottom end abuts against the outer side of the plane adjustment ring.
3. The accelerating tube adjustment device according to claim 1, characterized in that: The verticality adjustment bracket is provided with at least three arms, and the at least three arms are connected to the at least three verticality adjustment components in a one-to-one correspondence; each arm is provided with a through hole, and the through hole is provided with an internal thread; The verticality adjustment assembly comprises: a vertical adjustment bolt, a fastening bolt, a butterfly spring, a first gasket group and a second gasket group; The bottom of the vertical adjustment bolt is threaded into the through hole of the corresponding support arm, and the middle of the vertical adjustment bolt is provided with a central hole with internal threads; The fastening bolt is inserted into the center hole of the vertical adjustment bolt, and there is a clearance fit between the fastening bolt and the center hole. The bottom end of the fastening bolt passes through the through hole on the verticality adjustment bracket and is screwed to the connecting hole on the plane adjustment ring. The butterfly spring is inserted into the vertical adjustment bolt and is located between the head of the vertical adjustment bolt and the verticality adjustment bracket; The first gasket set includes: a first gasket and a second gasket; the mating surfaces of the first gasket and the second gasket are curved surfaces; the first gasket and the second gasket are both inserted into the fastening bolt and arranged between the head of the fastening bolt and the head of the vertical adjustment bolt; The second gasket group includes: a third gasket and a fourth gasket; the matching surfaces of the third gasket and the fourth gasket are curved surfaces; the third gasket and the fourth gasket are both inserted into the fastening bolt and arranged between the bottom of the vertical adjustment bolt and the plane adjustment ring.
4. The accelerating tube adjustment device according to claim 3, characterized in that: The bottom of the first gasket is a convex curved surface, and the top of the second gasket is a concave curved surface corresponding to the convex curved surface; The bottom of the third gasket is a convex curved surface, and the top of the fourth gasket is a concave curved surface corresponding to the convex curved surface.
5. The accelerating tube adjustment device according to claim 2, characterized in that: The horizontal adjustment bolt is a fine-thread bolt.
6. The accelerating tube adjustment device according to claim 2, characterized in that: The pitch of the horizontal adjustment bolt is 0.75 mm.